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Silur / Silurian

Alter: 416 +/- 2,8 - 443,7 +/- 1,5 Mio. Jahre

Das Silur ist eine erdgeschichtliche Periode des Paläozoikum. Es umfasst den Zeitraum von vor ca. 443 Mio. Jahren bis vor ca. 416 Mio. Jahren. Nach unten wird das Silur durch das Ordovizium, nach oben durch das Devon begrenzt. Früher wurden auch die Bezeichnungen Gotland oder Gotlandium für die Zeitperiode des Silur verwendet.

Nach der internationalen Gliederung der IUGS ist das Silur in die vier Epochen Pridoli, Ludlow, Wenlock und Llandovery unterteilt. Für eine genaue zeitliche Einordnung und die Unterteilung der Epochen in Altersstufen siehe die Geologische Zeittafel.

Namensgebung

Die Bezeichnung Silur wurde nach Forschungen in Wales 1835 erstmals von Roderick Murchison verwendet. Namensgebend ist der keltische Volksstamm der Siluren, die in Südwales gelebt hatten. Damit folgte Murchison dem Beispiel von Adam Sedgwick, der die älteren Schichten im gemeinsam untersuchten Gebiet nach Cambria, dem alten Namen von Wales, Kambrium genannt hatte.

Paläogeographie

Im Silur setzte sich die Drift des Superkontinentes Gondwana in hohe südliche Breiten fort. Prägend für das Silur ist aber die beginnende Kollision der Kontinentalschollen (Kraton) Laurentia und Baltika und damit die Entstehung des zweiten Superkontinents Laurussia (auch Euramerika oder Old Red Kontinent). Die Kollision war Ursache für die Kaledonische Orogenese, der zweiten Phase der Akadischen Gebirgsbildung. Sie führte zur Auffaltung von Gebirgen in weiten Teilen Nord- und Westeuropas (Norwegen, Schweden, Schottland), sowie in Nordamerika und Grönland.

Klima

Während des Silur war die Vereisung der südlichen Landmassen weniger stark als zur Zeit des Ordovizium. Aufgrund des warmen Treibhausklimas führte die Abschmelzung der Eismassen zu einem starken Anstieg des Meeresspiegels, verbunden mit der Bidlung von tropischen Flachmeeren auf den überfluteten Kontinenten. In diesen warmen Flachmeeren bildeten sich umfangreiche Riffe. Zum Ende des Silur ging sank der Meeresspiegel wieder.

Flora

In der Pflanzenwelt erschienen die ersten Gefäßpflanzen (Cooksonia und Baragwanathia) und erste primitive Bärlappgewächse. Wahrscheinlich ist auch das Auftreten der ersten Pilze.

Fauna

Auf den Kontinenten existierte zur Zeit des Silur noch keine Fauna. Dagegen waren die tropische Flachmeere reich an Brachiopoden, Bryozoen, Mollusken und Trilobiten. Erste Knochenfische (Osteichthyes), vertreten durch die Stachelhaie (Acanthodii) traten auf. Ebenso lebten in den Meeren große, bis zu 3m lange Seeskorpione (Eurypterus). Siehe auch die Übersicht der Lebewesen im Silur.

Die Basis des Silur ist durch das erste große Massenaussterben der Erdgeschichte gekennzeichnet. Infolgedessen starben ca. 60% der maritimen Lebensformen aus.


Lebewesen die in der Erdgeschichte im Silur gelebt haben.

Abacocrinus

Favosites desolatus

Paraleiolichas globulus

Abacocrinus latus

Favosites exilis

Paraliospira

Aberia

Favosites fallax

Paraliospira angulata

Abyssocrinus

Favosites favosiformis

Paraliospira mundula

Acacocrinus

Favosites favosus

Paraliospira parva

Acaenoplax

Favosites gothlandicus

Paraliospira rugata

Acaenoplax hayae

Favosites hisingeri

Parallelodon

Acanthoceramoporella

Favosites ingens

Parallelopora

Acanthoclema

Favosites issensis

Parallelostroma

Acanthocrania

Favosites jaaniensis

Paralogania

Acanthocyclus

Favosites kalevi

Paralogania consimilis

Acanthocyclus porpitoides

Favosites mirandus

Paralogania kaarmisensis

Acanthograptus

Favosites multicarinatus

Paralogania klubovi

Acanthohalysites

Favosites praemaximus

Paralogania kummerowi

Acanthopyge (Lobopyge) hirsuta

Favosites privatus

Paralogania ludlowiensis

Acanthopyge (Lobopyge) parapleura

Favosites serratus

Paralogania martinssoni

Acanthopyge (Lobopyge) pristina

Favosites subfavosus

Paralogania tarranti

Acanthoscapha

Favosites subforbesi

Paramelocrinus

Acaretyrricula

Felinotoechia

Paramphipora

Acaretyrricula tenuiguttae

Fenestella

Paramplexoides

Acaste

Fenestella jupiterensis

Paraorthograptus

Acaste downingiae

Fenestella striolata

Paraorthograptus pacificus

Acastella

Fenestrellina

Paraorthograptus uniformis

Acastocephala

Fenestrirostra

Paraparchites

Acastocephala macrops

Fenestrirostra glacialis

Paraphragmites

Acdalina

Fentounia

Paraphtonia

Acernaspis

Fentounia helicorostrata

Parapisocrinus

Acernaspis (Eskaspis) sufferta

Ferestromatopora

Parapisocrinus quinquelobus

Acernaspis (Eskaspis) woodburnensis

Ferganella borealis

Paraplegmatograptus

Acernaspis copperi

Fibrocrinus

Paraplegmatograptus uniformis

Acernaspis orestes

Fibrocrinus phragmos

Paraproetus

Acernaspis superciliexcelsis

Finkelnburgia

Paraproetus brevifrons

Acernaspis xynon

Finksella

Pararaphistoma

Acervularia

Finksella turbinata

Pararaphistoma qualteriata

Achatella

Fistellaspongia

Paraschmidtella

Achatella schmidti

Fistellaspongia inclinata

Parasphaeronites

Achradocrinus

Fistulipora

Parasphaerorthoceras

Acidaspis

Fistulipora megastoma

Parasphaerorthoceras accuratum

Acidaspis aviensis

Fistuliporella

Parastauria

Acidaspis bispinosa

Fistuliramus

Parastriatopora

Acidaspis brightii

Flabellitesia

Parastriatopora celebrata

Acidaspis evoluta

Flabellitesia adaia

Parastriatopora mirifica

Acidaspis pectinata

Flabellitesia kessei

Parastriatopora nigrolimitata

Acidolites

Flectoconularia

Parastriatopora rhizoides

Acmophyllum

Flemingella

Parastrophina

Acodina

Fletcheria

Parastrophina angulosa

Acodina inoptinata

Fletcheriella

Parastrophina lindstroemi

Acodus

Fletcheriella catervatima

Parastrophina pentagonalis

Acodus jonesi

Fletcherina incognita

Parastrophinella

Acodus similaris

Flexicalymene

Parastrophinella reversa

Acrosaccus

Flexicalymene praelongicephala

Parastrophonella

Actinoceras

Flexicalymene quadricapita

Parastylonurus

Actinoceras carletonense

Flexicalymene scotica

Parastylonurus ornatus

Actinoceras lambei

Flexicalymene senaria

Paratetradium

Actinoceras lesperancei

Flexicalymene vaccarii

Parayoungia

Actinodictyon

Foersteoceras

Parayoungia brennardi

Actinodictyon suevicum

Foerstephyllum

Parayoungia eleyae

Actinodochmioceras

Foliomena

Parayoungia folinsbeei

Actinodonta

Forolina

Parayoungia mclaughlini

Actinophyllum

Forolinia

Parayoungia tuberculata

Actinopterella

Forolinia brevis

Parazophocrinus

Actinopteria

Forolinia implana

Pariocrinus

Actinopteria pumila

Forolinia laminaris

Parisocrinus

Actinostroma

Forolinia lenticularis

Parisocrinus mulletensis

Actinostromella

Forolinia lineata

Parka

Acutiramus

Forolinia pachyphylla

Parmorthina

Acutiramus floweri

Forolinia paka

Parmula

Adamczakia

Fosselasma

Parmula hemisphaerica

Adaverina

Fosselasma unicum

Parodospongia

Adaverina gutta

Fossopora

Parodospongia euhydra

Aechmina

Fragiscutum

Paroistodus

Aechminaria

Fragucrinus

Paromalomena

Aegiria

Fragucrinus bothros

Paromalomena inequistriata

Aegiria apta

Frammia

Paromalomena macmahoni

Aegiria garthensis

Freja

Paroocerina

Aegiria norvegica

Frodospira

Paroocerina arctum

Aegiromena

Frodospira cochleata

Paroocerina borealis

Aegiromena (Aegiromenella) planissima

Frodospira imbricata

Parulrichia

Aegiromena durbenensis

Frodospira munda

Parvigena

Aesopomum

Frodospira tortuosa

Parvigena putealis

Aesopomum delicatum

Frostiella

Pasceolus

Aetholicotoxotis

Fuchsella amygdalina

Passalocrinus

Aetocrinus

Fungochitina

Patelliocrinus

Aetocrinus gracilis

Furcaster

Patellispongia

Agarhyncha

Furcaster leptosoma

Patellispongia alternata

Agelacrinites

Furcitella

Patellispongia attenuata

Agetograptus

Furcitella nodosa

Patellispongia mackenziensis

Agetolites

Furculosus

Patellispongia rugosa

Akidograptus

Furculosus carpathicus

Paterula

Akrosphaerorthoceras

Fusispira

Patrocardia

Alaskadiscus giganteus

Fusispira gigantea

Pattersonia

Alaskadiscus laticonchus

Fusispira ventricosa

Paucicrura

Alaskadiscus tenuis

Fuyunia

Paulicystis

Alaskaspongiella

Gabelia

Paulicystis densus

Alaskaspongiella laminosa

Gabelia intermedia

Paulicystis sparsus

Alaskodiscus

Gabelia pedunculus

Pauline

Alaskospira

Galeograptus

Pauline avibella

Alaskospira dunbari

Galerodus

Paulocrinus

Alaskospira fabiformis

Galerodus magalius

Paupospira

Alastega

Galtoceras

Paupospira akpatokensis

Alastega lira

Gamachignathus

Paupospira beatrice

Aldanispirifer

Gannibeyrichia

Paupospira burginensis

Aldridgeodus

Gaotania

Paupospira circe

Aldridgeodus minimus

Garniella

Paupospira manitouliensis

Aleodonta

Garwoodia

Paupospira moorei

Aleodonta burei

Gasconsia

Paupospira thebesensis

Algerina algena

Gasconsoceras

Paupospira trilineata

Algites

Gaspocyrtoceras

Paupospira varians

Alisocrinus

Gaspocyrtoceras clarksoni

Paurorthis

Alispira

Gazacrinus

Paurorthis inopinatus

Allocrinus

Geisonoceras

Pedavis

Allocystites

Geisonoceras kureikense

Pedomphalella

Allodesma

Geisonoceras maclareni

Peiragraptus

Allonema

Geisonoceras wegelini

Pelekysgnathus

Allonema silurica

Geisonocerina

Pelekysgnathus index

Allorisma

Gelidorthina

Pelicaspongia

Allotropiophyllum

Gelidorthis

Pelicaspongia perforata

Allozygocrinus

Gephuropora

Pelidocrinus

Allozygocrinus dubuquensis

Gephuropora infera

Peltocaris

Allozygocrinus exallos

Gephuropora varia

Pembrostrophia

Allumettoceras

Gerasaphes

Pemphocystis

Alopocrinus

Geraspis

Penniretepora

Alopocrinus parvus

Geraspis rara

Pentacystis

Altaethyrella zhejiangensis

Gerronodictyon

Pentacystis gibsoni

Altaja

Gerronostroma

Pentagonocyclicus

Alveolella

Gerronostroma juveneforme

Pentamerifera

Alveolites

Gibberella

Pentameroceras

Alytodonta

Giganteograptus

Pentameroides

Alytodonta gibbosa

Gillatia

Pentameroides septentrionalis

Amblysiphonella

Giraldibella

Pentameroides subrectus

Ambocoelia

Giraldibella bella

Pentamerus

Ambonychia

Giraldibella hyskovensis

Pentamerus asiaticus

Ambonychia alata

Giraldiella

Pentamerus gothlandicus

Ambonychia cultrata

Giraldiella giraldi

Pentamerus oblongus

Ambonychia obesa

Giraldiella protensa

Pentamerus palaformis

Ambonychia volitans

Giraldiella subsilurica

Pentlandella

Ambonychinia

Girtyocoelia

Pentlandia

Ambonychinia corrugata

Girtyocoelia epiporata

Pentlandina

Ambonychinia demissa

Girtyocoelia minima

Pentlandina harperi

Ambonychinia striata

Girvanella

Pentlandina lamelliformis

Ambonychiopsis

Girvanella problematica

Pentlandina lewisii

Ambonychiopsis osmundsbergensis

Girvanella richmondensis

Pentlandina loveni

Americaspis

Gissocrinus

Pentlandina parvula

Amerista

Gissocrinus ludensis

Pentlandina tartana

Ammodiscus

Gladiostrophia

Pentlandopterus

Amorphognathus

Glansicystis

Pentlandopterus minor

Amorphognathus duftonus

Glassia

Perforocycloides

Amorphognathus ordovicicus

Glassina

Perforocycloides nathalieae

Amorphognathus ordovicius

Glassina laeviuscula

Periechocrinus

Amorphognathus ventilatus

Glauconome plumula

Periodon

Amosina

Glauconome strigosa

Periodon aculeatus

Amosina paolae

Glauconomella

Periodon grandis

Amosina pediculorum

Glauconomella disticha

Perissocoelia

Amphicoelia leidyi

Globispira acuta

Perissocoelia gelasinina

Amphicoelia pojetana

Globonema

Perissocoelia spinosa

Amphicyrtoceras

Globonema fraternum

Peritrimerella

Amphilichas

Globonema kaysi

Pernericirrus

Amphilichas dalecarlicus

Globonema kokeni

Pernericirrus sinistorus

Amphilichas latifrons

Globonema lyelli

Peronopora

Amphilichas lineatus

Globonema muricatum

Perryus

Amphilichas wahlenbergi

Globonema pauperum

Perryus severnensis

Amphiocoelia

Globonema peregrinum

Pesnastylus

Amphiplecia

Globonema turritum

Petalichnus

Amphiplecia bondarevi

Globulaspis

Petalocrinus

Amphiplecia tardicostata

Glomospira

Petalocrinus bifidus

Amphipora

Glomospirella

Petalograptus

Amphipsalidocrinus

Glossites

Petalolithus

Amphisella

Glossites (Pharciglossites) rugatus

Petalotrypa

Amphistrophia

Glossoceras

Petraia

Amphistrophia striata

Glossograptus

Petraster

Amphistrophia whittardi

Glossoleptaena

Petridiostroma

Amphistrophiella funiculata

Glossoleptaena emarginata

Petridiostroma incrustatum

Amphitoxotis

Glossoleptaena pixis

Petridiostroma parsimplex

Amplexograptus

Glossus

Petridiostroma regulare

Amplexograptus manitoulinensis

Glyptambon

Petrocrania

Amplexoides

Glyptocrinus

Petrocrania mullochensis

Amplexopora

Glyptograptus

Petrozium

Amplexus

Glyptograptus tamariscus

Petrozium losseni

Ampuloides

Glyptomena

Petrozium staufferi

Ampyx

Glyptorthis

Pezopallichthys

Amsassipora

Glyptorthis crispata

Pezopallichthys ritchiei

Amsdenina

Glyptorthis daytonensis

Phacopidella

Amsdenoides

Glyptorthis fausta

Phacopidella trisulcata

Amsdenostrophiella prolongata

Glyptorthis insculpta

Phacops

Amydrotaxis

Glyptorthis irrupta

Phacops crosslei

Amygdalella

Glyptorthis marilara

Phacops macdonaldi

Anabaia

Glyptorthis maritima

Phaenophragma

Anabaria

Glyptorthis vidari

Phaenopora

Anacaenaspis

Gnamptorhynchos

Phaenopora ensiformis

Anacaenaspis callipareos

Gnamptorhynchos globatum

Phaenopora explanata

Anacaenaspis dealgach

Gnamptorhynchos orbiculoidea

Phaenopora multifida

Anacaenaspis emarginata

Gnathodus

Phaenoporella

Anacaenaspis gotlandensis

Gnorimocrinus

Phanassymetria

Anacaenaspis zedei

Gochtia

Phanerotrema

Ananaspis

Goldillaenus

Phanerotrema axion

Anapetopsis

Goldius

Phanerotrema communis

Anapetopsis fasciatus

Gomphoceras

Phanerotrema consimilis

Anapetopsis fastigiatus

Gomphocystites

Phanerotrema dolium

Anapetopsis lalajae

Gomphocystites glans

Phanerotrema jugosum

Anapetopsis maclearni

Gomphocystites indianensis

Phanerotrema lindstroemi

Anaphragma

Gomphodus

Phanerotrema occidens

Anartiocystis

Gomphonchus

Phanerotrema rugosa

Anartiocystis foerstei

Gomphonchus hoppei

Pharetrolites

Anasobella

Gomphonchus sandelensis

Pharetrolites cristatus

Anaspyroceras

Gonatocaris

Pharetrolites murchisoni

Anastrophia

Gongylostonyx

Phaulactis

Anastrophia deflexa

Goniodontus lindstroemi

Phaulactis semaiophylloides

Anatiferocystis

Goniophora

Phialaspis

Anatrypa

Goniophora (Goniophora) cymbaeformis

Philhedra

Anazyga

Goniophora ascia

Philhedra stawyensis

Anazyga recurvirostra

Goniophora bragei

Phillipsinella

Ancillotoechia

Goniophora brimeri

Philoxene

Ancillotoechia ancillans

Goniophora compta

Philoxene alacer

Ancillotoechia bidentata

Goniophora gymeri

Philoxene mopsus

Ancillotoechia eva

Goniophora solci

Philoxene paveyi

Ancistrorhyncha

Goniophora thula

Philoxene perlongus

Ancoradella

Goniophora tyri

Philoxene plicatulus

Ancoradella ploeckensis

Goniophorina

Philoxene praestans

Ancyrochitina

Goniophorina (Cosmogoniophorina) carinata

Philoxene sodalis

Andreolepis

Goniophorina nitidula

Phimocrinus

Angochitina

Goniophyllum

Phlebolepis

Angopora dubia

Goniosphaeridium

Phlebolepis elegans

Angopora hisingeri

Goniostropha bachelieri

Phlebolepis ornata

Angopora tenuicula

Goniotrypa

Phoenicitoechia

Angopora vera

Goniotrypa bilateralis

Phoenicitoechia martinensis

Angullongia vesica

Goniporus

Pholidostrophia

Angullophyllum

Goniporus alatus

Pholidostrophia (Eopholidostrophia) cocksi

Angulospira

Goodsiraspis

Pholidostrophia (Mesopholidostrophia) lamellosa

Angulospira striata

Goodsiraspis packardi

Phormograptus

Anisocrinus

Gorbyoceras

Phosphannulus

Anisocrinus prinstaensis

Gorbyoceras gorbyi

Phragmoceras

Anisopleurella

Gorbyoceras hammelli

Phragmoceras munthei

Anisopleurella anceps

Gordia

Phragmodictya

Anisopleurella asiatica

Gordonaster

Phragmolites

Anisotrypa

Gordonaster brassfieldensis

Phragmolites desideratus

Ankyloceras

Gorgonisphaeridium

Phragmolites lindstroemi

Anodontopsis

Gotatrypa

Phragmolites pannosus

Anolotichia ponderosa

Gothocrinus

Phragmolites phaecus

Anomalocoelia

Gothograptus

Phragmolites slawsoni

Anomalocystites

Gotlandechinus

Phragmorthis

Anomalodonta gigantea

Gotlandella

Phragmosphaera

Anomalotoechus

Gotlandellites

Phragmosphaera expansus

Anomalotoechus typicus

Gotlandites

Phragmosphaera globata

Anoplotheca

Gotlandochitina

Phthonia

Anoptambonites

Gotlandochiton

Phthonia regularis

Anoptambonites myiomorpheus

Gotlandochiton interplicatus

Phyllodictya

Anoptambonites myriomorpheus

Grabauphyllum

Phylloporina

Anoptambonites williamsi

Gracianella

Phylloporina kinnekullensis

Anoptera angusta

Gracianella graciosa

Phyrtosaster

Anostylostroma

Gracianella lissumbra

Phyrtosaster casteri

Ansella

Gracianella rudicristata

Pidelocrinus

Ansella jemtlandica

Grammolomatella

Pileograptus

Anthaspidella

Grammysia

Pilina

Anthinocrinus

Grandostoma

Pilina solarium

Anticalyptraea

Grandostoma caudatum

Pilina unguis

Anticalyptraea westergaardi

Grandostoma taconicum

Pilla

Anticostia

Granulatisporites

Pilolepsis

Anticostiodus

Graptodictya

Pilophyllia

Anticostiodus fahraeusi

Graptodictya boreniensis

Pilophyllum

Antihomocrinus

Graptolites

Pilophyllum massivum

Antiplectoceras

Graticula

Pilophyllum porosum

Antiplectoceras askerense

Gravicalymene

Pilophyllum zonatum

Antirhynchonella

Gravicalymene quadrata

Pinguaella

Antirhynchonella linguifera

Grayina

Pinguispirifer

Antrospongia

Greenfieldia

Pinnocaris

Antrospongia aberrans

Grewingkia

Pinnocaris lembodes

Aparchites

Grewingkia contexta

Pinocladia

Apatobolbina

Grewingkia robustum

Pinocladia triangulata

Apatognathus

Grypocrinus

Pinpilla

Apatognathus lipperti

Guandacolithus

Pinpilla uformis

Aphanomena chilcaensis

Guelphinacella

Pionodema

Aphanomena planoconvexa

Guelphinacella canadense

Pionodema aberstadti

Aphanomena schmalenseei

Guerichina

Pionodema hypermeca

Aphanomena urbicola

Guiyu

Pisocrinus

Aphelognathus

Guiyu oneiros

Pisocrinus campana

Aphelognathus pyramidalis

Gunnarella

Pisocrinus sphericus

Aphrosalpinx

Gunnarella magnifica

Pittsfordipterus

Aphrosalpinx nana

Gypidula

Placocliftonia

Aphrosalpinx textilis

Gypidula akimiskiformis

Placocliftonia colibri

Apianurus

Gypidula galeata

Placocoenites

Apianurus clevei

Gypidula rudiplicativa

Placocoenites orientalis

Apiculiretusispora

Gypidula simplex

Placocoenites pellicula

Apidium indicum

Gypidulina

Placocystites

Apiocystites

Gyrodoma

Placotriplesia

Apoarchaeocrinus

Gyrodoma marylandica

Plaesiomys

Apoarchaeocrinus anticostiensis

Gyrolithes

Plaesiomys anticostiensis

Apocalymene

Gyronema

Plaesiomys bellilamellosus

Apolichas

Gyrosphaera

Plaesiomys carletona

Apolichas truncatus

Gyrosphaera raneatela

Plaesiomys idahoensis

Appendispinograptus

Gyrosphaera siljanensis

Plaesiomys porcata

Appendispinograptus supernus

Hadoceras

Plaesiomys rockymontana

Appendispinograptus venustus

Hadoceras septocurvatum

Plaesiomys subquadratus

Apsidoceras

Hadrognathus

Plagiorhyncha

Apsidognathus

Hadromeros

Plagiorhyncha cordata

Apsidognathus tuberculatus

Hadromeros elongatus

Plagiorhyncha depressa

Apsidognathus walmsleyi

Hadromeros keisleyensis

Plagiostomoceras

Aptilechinus

Hadroskolos

Plagiostomoceras culter

Aptychopsis

Hadroskolos pentastichos

Plagiostomoceras pleurotomum

Apycnodiscus

Hagnocrinus

Planalveolites

Apycnodiscus insularis

Hagnocrinus bainbridgensis

Planiscutellum

Aquirrea

Hagnocrinus balli

Planitrochus

Aquirrea fluegelii

Hagnocrinus crenus

Planocoenites

Arabellites

Halichondrites

Planolites montanus

Arachnophyllum

Haliestes

Plantella

Arachnophyllum approximatum

Haliestes dasos

Plasmophyllum

Arachnophyllum murchisoni

Hallicystis

Plasmopora

Arachnophyllum pentagonum

Halliella

Plasmoporella

Arachnostega

Hallograptus

Platyceras

Arachnostega gastrochaenae

Hallopora

Platyceras angulatum

Araeopoma

Hallopora dalmani

Platyceras disciforme

Araneosustroma

Hallopora elegantula

Platyceras niagarensis

Araneosustroma astroplexum

Hallopora multipora

Platyconus

Araspirifer

Hallopora solbergiensis

Platycoryphe

Aratanea

Halysis

Platylichas

Aratanea monodi

Halysites

Platylichas (Rontrippia) grayii

Aratoechia

Halysites catenularia

Platylichas cicatricosus

Archaefenestella

Halysites catenularius

Platylichas infimus

Archaefenestella mobergi

Halysites grandis

Platyloron

Archaeocalyptocrinus

Halysites junior

Platyloron voluta

Archaeofenestella

Halysites priscus

Platymena

Archaeophialia

Halysites regularis

Platymetopus

Archaeophialia antiquissima

Halysites senior

Platyorthis

Archaeopraga

Hamarodus

Platyorthis ovalis

Archaeopraga pinnaeformis

Hamarodus europaeus

Platyostoma

Archaeoscyphia

Hanilepis

Platyostoma adstrictum

Archaeoscyphia alternata

Hanyangaspis

Platyostoma boggsi

Archaeoscyphia attenuata

Hanyangaspis guodingshanensis

Platyostoma brownsportense

Archaeoscyphia boltoni

Hapalocrinus

Platyostoma cliftonensis

Archaeoscyphia gislei

Hapalocrinus quinquepennis

Platyostoma cornutum

Archaeoscyphia minganensis

Haplentactinia

Platyostoma daytonense

Archaeoscyphia rectilinearis

Haplistion

Platyostoma hemispherica

Archaeoscyphia scalaria

Haplistion creswelli

Platyostoma humile

Archegonaspis

Haplistion cylindricum

Platyostoma niagarensis

Archeochonetes muirwoodae

Haplistion frustrum

Platyostoma perforatum

Archinacella

Haplistion minutum

Platyostoma plebeium

Archinacella estella

Haplistionella

Platyostoma ventricosum

Archinacella indianensis

Haplistionella garnieri

Platyrhomboides

Archinacella kagawongensis

Haplistionella minitraba

Platyschisma

Archinacella laevis

Haploprimitia

Platyschisma infima

Archinacella rotunda

Haplosphaeronis

Platystrophia

Archinacella rugatina

Haplosphaeronis oblonga

Platystrophia acutilirata

Archipelepis

Haplospira craigi

Platystrophia annieana

Archipelepis turbinata

Haplotaeniatum

Platystrophia biforatus

Archiretiolites

Haplotaeniatum cathenatum

Platystrophia clarksvillensis

Arcticalymene

Hapsiphyllum

Platystrophia crassoplicata

Arctinurus

Haptocrinus

Platystrophia cypha

Arctinurus anticostiensis

Hardieopterus

Platystrophia hopensis

Arctinurus boltoni

Hardieopterus macrophthalmus

Platystrophia laticosta

Arctomeristina

Harpes

Platystrophia lynx

Arctoplax

Harpidella

Platystrophia ponderosa

Arctoplax ornata

Harpidella (Harpidella) newlandensis

Platytrochalos

Arcuaria

Harpidella (Harpidella) thomasi

Platytrochalos crudicostatus

Arenorthis

Harpidella megalops

Platytrochalos peninversus

Arenorthis arenaria

Harpidella occidentalis

Platytrochalos pulvinatus

Arenorthis paranaensis

Harpidium

Plectambonites schmidti

Areostrophia

Harringtonacaste

Plectatrypa

Ariaspis arctata

Harringtonia

Plectatrypa imbricata

Ariaspis ornata

Harrisoceras

Plectatrypa lamellosa

Arionoceras

Havlicekia

Plectatrypa savagei

Arionoceras canonicum

Healdia

Plectatrypa unicosta

Arionoceras capillosum

Healdianella

Plectoceras

Arionoceras densiseptum

Hebellum

Plectochitina

Arisaigaster

Hebertella

Plectodina

Arisaigia

Hebertella maria

Plectodonta

Arjamannia

Hebertella occidentalis

Plectodonta (Plectodonta) mariae

Arjamannia aulangonensis

Hebertella sinuata

Plectodonta (Plectodonta) minima

Arjamannia cancellatula

Hebetoechia

Plectodonta bipartita

Arjamannia inexpectans

Hecetaphyton

Plectoglossa

Arjamannia pteronoides

Hecetastoma

Plectograptus

Arjamannia sybellina

Hecetastoma clarki

Plectonotoides boucoti

Arjamannia woodlandi

Hecetastoma gehrelsi

Plectonotoides cherylae

Arkonoceras

Hecetastoma salteri

Plectonotoides trilobatus

Armenoceras

Hedeia

Plectonotus

Armenoceras chicottense

Hedeina

Plectonotus derbyi

Armenoceras cygneum

Hedeina crispa

Plectorthis

Armenoceras michaudae

Hederella

Plectorthis plicatella

Armenoceras nummularium

Hederella canadensis

Plectospathodus extensus

Armenoceras raptor

Hedstroemina

Plectospira

Armenoceras subconicum

Hedstroemina reticulata

Plectostroma

Arthroclema brevis

Hedstroemophyllum nikiforovae

Plectostroma intertextum

Arthroclema pentagonalis

Heikea nux

Plectostroma necopinatum

Arthropoma

Heikea reniformis

Plectothyrella

Arthrorhachis

Heikea rotunda

Plectothyrella crassicosta

Arthrotrypa

Helenolepis

Plectothyrella itacurubiensis

Arthrotrypa ovata

Helenolites

Plectotreta

Asaphocrinus

Helicelasma

Plectotreta lindstroemi

Ascanigypa

Helicelasma rusticum

Plectrochiton

Ascetopeltis

Helicelasma simplex

Plectrochiton tegulus

Ascoceras

Helicelasma whittardi

Plegagnathus

Ascograptus

Helicocrinus

Plegagnathus dartoni

Asinomphalus

Helicotoma brocki

Plegmatograptus

Asinomphalus antiqua

Helicotoma marginata

Plemeroceras

Aspeluindia

Helicotoma superba

Plemeroceras cassis

Aspelundia

Heliocrinites

Pleostylostroma

Aspelundia fluegeli

Heliocrinites stellatus

Plesicarinatina

Asperophyllum

Heliolites

Plesiowensus

Asperopora

Heliolites barrandei

Plesiowensus confossus

Asperopora crustulenta

Heliolites waicunensis

Plesiowensus obconicus

Aspidograptus

Helioplasma

Plethobolbina

Aspidopora

Helioplasmolites

Pleurocornu

Astakocrinus

Helminthidium

Pleurocystites beckeri

Astakocrinus teren

Helminthochiton

Pleurodictyum

Astarte

Helminthoidichnites

Pleurodium

Asthenophyllum

Helminthoidichnites marinus

Pleurograptus

Astraeospongium

Helokybe

Pleurograptus linearis

Astrocerium

Heloplax

Pleurorima

Astropentagnathus

Heloplax papilla

Pleurorima cytherea

Astropentagnathus irregularis

Helopora

Pleurorima kayseri

Astroproetus

Helopora fragilis

Pleurorima leptoconcha

Astroproetus pseudolatifrons

Hemiagetolites longiseptatus

Pleurorima migrans

Astroviella

Hemiagetolites palaeofavositoides

Pleurorima pragensis

Astroviellina

Hemiagetolites spinimarginatus

Pleurorima tranquilla

Astylospongia

Hemiarges

Pleurorima wisbeyensis

Astylospongia lutera

Hemiarges extremus

Pleurorthoceras

Astylospongia praemorsa

Hemicosmites

Pleurorthoceras clarksvillense

Astylospongiella

Hemicosmites grandis

Pleurorthoceras osmundsbergense

Astylospongiella striola

Hemicosmites sculptus

Pleurorthoceras subcostatum

Atactocrinus

Hemicosmites variabilis

Pleurotomaria

Atactocrinus wilmingtonensis

Hemicosmorthoceras

Pleurotomaria (Euryzone) comatula

Atactoporella

Hemicosmorthoceras laterculum

Pleurotomaria alatus

Atactotoechus

Hemicosmorthoceras semimbricatum

Pleurotomaria viola

Atavograptus

Hemicyclaspis

Plexodictyon

Atavograptus atavus

Hemicystites

Plexodictyon gobiense

Ateleaspis

Hemieridotrypa

Plicanoplia

Atelodictyon

Heminematopora

Plicatomurus

Athenaegis

Hemisphaerammina

Plicidium

Athenaegis chattertoni

Hemitoechia

Plicocyrtia

Athyris

Hemitoechia distincta

Plicodendrocrinus

Atractopyge

Hemitoechia undvaensis

Plicodendrocrinus petryki

Atractopyge brevicauda

Hemsiella

Plicoplasia

Atractopyge confusa

Hennigopora

Plicostricklandia

Atrypa

Hennigopora apta

Plicostropheodonta

Atrypa (Gotatrypa) blodgetti

Hercochitina

Plumatalinia

Atrypa (Gotatrypa) hedei

Hercotrema

Plumulites

Atrypa (Gotatrypa) variabilis

Hercotrema pentaforma

Podollites

Atrypa dormitzeri

Hercotrema spissicostatum

Podollites diseptatus

Atrypa hedei

Hercynella

Podowrinella

Atrypa putilla

Hermatostroma

Podowrinella straitonensis

Atrypa reticularis

Hernodia

Poikilofusa spinata

Atrypella borealis

Heropyrgus

Pojetaconcha

Atrypella scheii

Heropyrgus disterminus

Pojetaconcha davidis

Atrypella tenuis

Herpetocrinus

Pojetaconcha praepristis

Atrypina

Herrmannina

Polenovula

Atrypina barrandii

Hesperorthis

Poleumita

Atrypinella

Hesperorthis avalanchensis

Poleumita alatum

Atrypinopsis

Hesperorthis davidsoni

Poleumita crenulata

Atrypoidea australis

Hesperorthis gotlandica

Poleumita discors

Atrypoidea latilingulata

Hesperorthis hillistensis

Poleumita gyrans

Atrypoidea linguata

Hesperorthis martinssoni

Poleumita hudsonica

Atrypoidea praelingulata

Hesperorthis onniensis

Poleumita incarinatus

Atrypoidea prunum

Hesperorthis pyramidalis

Poleumita octavia

Atrypoidea scheii

Heterolasma

Poleumita rugosa

Atrypopsis severnensis

Heterorthella

Poleumita scamnata

Auchenaspis

Heterorthella precordillerana

Poleumita semiplanus

Auchenaspis verrucosus

Heterorthella tondonensis

Poleumita vernonensis

Augustoceras molense

Heterorthina

Poleumita walmstedti

Aulacatrypa

Heterorthina cybele

Poloniella

Aulacera

Heterorthina fairmountensis

Polybranchiaspis

Aulacera cylindrica

Heterotrypa

Polychaetaspis

Aulacera nodulifera

Heterotrypa compressa

Polydeltoideus

Aulacera plummeri

Hexacrinites

Polydeltoideus enodatus

Aulacera radiata

Hexameroceras

Polygnathoides

Aulacera undulata

Hexatractiella

Polygrammoceras

Aulacognathus

Hexatractiella nevadensis

Polygrammoceras chicottense

Aulacognathus bullatus

Hexatractiella pseudonevadensis

Polygrammoceras ellisense

Aulacognathus latus

Hexedriocystis mimus

Polyorophe

Aulacopleura

Hexismia

Polyplacospongia

Aulichnites

Heyuncunoceras

Polyplacospongia nodosa

Aulocopium

Hibbardella

Polypora

Aulocopium nana

Hibbertia costatus

Polytropis durhamensis

Aulocystella

Hillaepora

Polytryphocycloides

Aulopora

Hillophyllum

Polytryphocycloides huronensis

Aulopora amica

Hindella

Polytryphocycloides lindstroemi

Aulopora assueta

Hindella angustifrons

Pomerantsoceras

Aulopora celsa

Hindella cassidea

Pomerantsoceras tibia

Aulopora enodis

Hindella crassa

Pompeckia

Aulopora necopina

Hindella incipiens

Pompeckia minor

Aulopora repens

Hindella kiaeri

Poracanthodes

Auloporella

Hindella prinstana

Porefieldia

Auriptygma

Hindella umbonata

Porefieldia robusta

Auriptygma bulimina

Hindenites

Porfirieviella

Auriptygma fenestrata

Hindeodella equidentata

Porkunioceras

Auriptygma fortior

Hindeodella excavata

Porkunioceras tuba

Austinella

Hindia

Porkunites amalloides

Australina

Hindia sphaeroidalis

Porkunites dubius

Australoacaste

Hircinisca

Porosothyone

Australobollia

Hiregiroceras

Porosothyone picketti

Australonema

Hiregiroceras costalatum

Porpites

Australonema varvarae

Hiregiroceras verum

Porpites rotuloides

Australophyllum

Hirnantia

Portranella

Australoscutellum

Hirnantia noixella

Praeanomalodonta

Australostrophia

Hirnantia sagittifera

Praecardium

Avalanchia

Hirneacrinus

Praectenodonta

Avalanchia pterocarina

Hirneacrinus cupellaeformis

Praeidiostroma

Avalanchurus

Hirneacrinus perplanus

Praeleda compar

Aviacypris

Hiscobeccus

Praelucina

Avitograptus

Hiscobeccus capax

Praenucula

Avitograptus avitus

Hisingerella tenuis

Praenucula abrupta

Axolasma

Histiodella

Praenucula dispar

Axuolites

Hoegisphaera

Praenucula faba

Azygograptus

Hogmochilina

Praeostrea

Bactrocrinites

Holacanthia sytovae

Praeostrea bohemica

Bactrotheca

Hollinella

Pragamira

Baculograptus

Holmipterus

Pragamira perlonga

Baikitolites

Holmophyllum

Pragnellia

Bairdiocypris

Holocystites

Pranognathus

Bajgolia

Holocystites (Holocystites) alternatus

Pranognathus siluricus

Balizoma

Holocystites (Megacystites) abnormis

Prantlia

Baltisphaeridium

Holocystites (Sepulticystis) spangleri

Prasopora

Baltoniodus

Holocystites cylindricus

Pregazacrinus

Baltoniodus variabilis

Holocystites salmoensis

Preodontochile

Bancroftina

Holocystites scutellatus

Preodontochile springfieldensis

Bancroftina bouceki

Holopea

Pribylites

Baragwanathia

Holopea applanata

Pribylograptus

Baragwanathia longifolia

Holopea filosus

Primaspis

Barbarorthis

Holopea gigantea

Primaspis evoluta

Barbarorthis laurentina

Holopea gracia

Primitia

Barbarorthis porkuniensis

Holopea guelphensis

Primitia lativia

Barbatulella

Holopea hubbardi

Primitiella

Barrandecirrus

Holopea latens

Primitiopsis

Barrandecirrus filiformis

Holopea media

Prioniodina

Barrandella

Holopea nicolettensis

Prioniodina excavata

Barrandella kindlei

Holopea obsoleta

Prioniodus

Barrandeocarpus

Holopea rossbrookiensis

Prionopeltis

Barrandeoceras

Holopea scalariforme

Priscosolenia

Barrandeocrinus

Holopea symmetrica

Priscosolenia aliena

Barrandeograptus

Holopea transversa

Priscosolenia perarmata

Barrandeolites

Holopella

Priscosolenia prisca

Barrandina

Holopella expandens

Prisochiton

Bassipterus

Holopella gracilior

Pristeroceras

Basslerites

Holopella jovialis

Pristiograptus

Batocara

Holopella modesta

Pristognathus

Batostoma

Holopella parvula

Pristognathus bighornensis

Batostoma gracilis

Holopella regularis

Probillingsites

Batostomella

Holopella teres

Proboscina

Baturria

Holophragma

Proboscisambon

Bdellacoma

Holophragma calceoloides

Procarinaria

Bdellacoma vermiformis

Holorhynchus

Procarinaria zephyrina

Beatricea undulata

Holorhynchus giganteus

Procarinatina

Becscia

Holotrachelus

Procephalaspis

Becscia carletona

Holotrachelus punctillosus

Proclimacograptus

Becscia scissura

Holtedahlina

Proclimacograptus angustatus

Becsciecrinus

Holtedahlina paraprostrata

Proconchidium

Becsciecrinus adonis

Holtedahlina sinica

Proconchidium brodeurensis

Becsciecrinus groulxi

Holtedahlina suedica

Proconchidium munsteri

Beecheroscapha

Holtedahlina sulcata

Prodarwinia

Beecheroscapha bispinosa

Holtedahlina varsensis

Productorthis

Beitaia

Homalaspidella

Productorthis aculeata

Bekkeromena

Homalaspidella borealis

Productus

Belemnospongia

Homalonotus

Proetus

Belemnospongia epiradiatus

Homocrinus

Proetus (Bohemiproetus) magnicerviculus

Belenopyge

Homocrinus parvus

Proetus (Gerastos) subcarinatus

Bellerophon

Homocystites

Proetus (Gerastos) sugiharensis

Bellerophon havliceki

Homoeospira

Proetus (Proetus) subovalis

Bellerophon ledburiensis

Homoeospira baylei

Proetus ainae

Bellerophon miser

Homoeospira evax

Proetus alaricus

Bellerophon scaber

Homoeospira fiscellostriata

Proetus concinnus

Bellerophon shelbiensis

Homoeospirella

Proetus interjectus

Bellerophon solitarius

Homoeospirella multicostata

Proetus latifrons

Belodella

Homotrypa

Proetus scoticus

Belodella cooperi

Homotrypa anticostiensis

Proetus simus

Belodella resima

Homotrypa niagarensis

Progalerus

Belodella silurica

Horderleyella

Proheliolites

Belodina

Horderleyella fragilis

Prokopicrinus

Belodina compressa

Horiostomella

Promelocrinus

Belodina confluens

Horiostomella otiosa

Promissum

Beloitoceras

Hormocrinus

Promissum pulchrum

Beloitoceras amoenum

Hormocrinus quebecensis

Promopalaeaster

Beloitoceras bucheri

Hormotoma acuminata

Promopalaeaster granulosus

Belonechitina

Hormotoma antigonishensis

Promopalaeaster wykoffi

Bembexia

Hormotoma articulata

Promourlonia

Bembicosoma

Hormotoma centervillensis

Promourlonia ambiqua

Bembicosoma pomphicus

Hormotoma concinnus

Promourlonia biformis

Beraunia

Hormotoma funata

Promourlonia durhamensis

Beraunia bifrons

Hormotoma gigantea

Promourlonia furcata

Beraunia bohemica

Hormotoma gracilis

Proparaparchites

Beraunia carens

Hormotoma grayiana

Propora

Beraunia detersa

Hormotoma insignis

Proromma

Beraunia docens

Hormotoma latifasciatum

Proromma bregmops

Beraunia elliptica

Hormotoma piperi

Proschizophoria

Beraunia indocilis

Hormotoma tenuifilosa

Prosolarium

Beraunia placida

Hormotoma teretiformis

Prosolarium crenulata

Beraunia querenda

Hormotoma winnipegensis

Prosolarium deiopei

Beraunia severa

Horologium

Prosolarium dominus

Beraunia verna

Horologium kokeni

Prosolarium duslii

Berolinella

Hostimex

Prosolarium halei

Berouniconcha

Hostinella

Prosolarium incumbens

Berouniconcha filosum

Howella

Prosolarium limata

Berouniconcha hesione

Howellella

Prosolarium procerum

Bessazoon

Howellella anglica

Prosolarium scalatum

Bessazoon gibbae

Howellella crispa

Prosolarium striatissima

Besselodus

Howellella elegans

Prosoptychus

Besselodus borealis

Howellella porcata

Prosoptychus globulus

Bevocastria

Howellella subinsignis

Prosoptychus projectus

Bevocastria conglobata

Howellites

Prosoptychus rotunda

Beyrichia

Howellites aenigmus

Prosoptychus sibiricus

Beyrichidiscus

Huddlella

Prosoptychus sphaera

Beyrichidiscus fecundatus

Hudsonaster

Prosoptychus wenlockensis

Bicarina

Hudsonaster incomptus

Prostrix

Bicarina petilitornata

Hudsonospongia

Protactis

Bickmorites

Hughmilleria

Protactis wenlockensis

Bicrenucula

Hughmilleria wangi

Protanastrophia

Bicrenucula elegans

Huronia

Protanastrophia indistincta

Bicuspina

Huroniella

Protanastrophia repanda

Biernatia curvata

Hustedograptus

Protarabellites

Bigalea

Hustedograptus teretiusculus

Protaraea

Bigalea aviformis

Huttagraptus

Protaraea diffluens

Bighornia

Huttagraptus acinaces

Protaraea procella

Bikocrinus

Huttoniella

Protaraea richmondensis

Billevittia

Hyalostelia

Protaster

Billevittia adraini

Hyattidina

Protaster sedgwickii

Billingsites anticostiensis

Hyattidina congesta

Protaster stellifer

Billingsites canadensis

Hyolithes

Protathyris

Billingsites manitoulinense

Hyperammina

Protatrypa

Bimuria

Hypsiptycha

Protatrypa malmoeyensis

Bimuria popovi

Hypsiptycha anticostiensis

Protatrypa thorslundi

Bingeria

Hypsiptycha janea

Protaxocrinus

Biparetis

Hyrokybe

Protaxocrinus paraios

Biparetis caledonia

Hyrokybe canadensis

Protaxocrinus sideros

Biparetis paucirugosus

Hyrokybe copelandi

Proteoceras

Birkenia

Hyrokybe hadnagyi

Proteorthis

Birksfeldia

Hyrokybe julli

Protobactrites

Birksfeldia circumplicata

Hyrokybe lenzi

Protocerauroides

Bisulcata

Hysterolites

Protochonetes

Bitrigonocardia

Hystrichopsydrax

Protochonetes elyensis

Bitrigonocardia diptera

Hystrichopsydrax sandersi

Protochonetes harricanensis

Bitrigonocardia elegantula

Hystricoceras

Protochonetes ludloviensis

Blakeoceras

Hystricoceras astraliformis

Protochonetes minimus

Bleshidium

Hystricoceras lundgreni

Protochonetes piltenensis

Bleshidium patellinum

Hystricoceras spinosum

Protochonetes striatellus

Bobellis

Ibanocrinus

Protocortezorthis

Bobellis oliveri

Ichiyamella

Protocrisina

Bodacrinus

Ichiyamella subglobula

Protocrisina exigua

Bodacrinus columnus

Ichthyocrinus

Protocyathactis

Bodophyllum

Icriodella

Protocycloceras

Bodophyllum osmundense

Icriodella deflecta

Protocytidium

Bodospira

Icriodus

Protocytidium elliottae

Bodospira kallholniensis

Icriodus woschmidti

Protokionoceras

Bodospira undulata

Icriognathus

Protokionoceras fessicancellatum

Bohemograptus

Icriognathus cornutus

Protoleptostrophia

Bohemograptus bohemicus

Icthyocrinus

Protomegastrophia

Bohemoharpes

Iddingsella

Protomegastrophia semiglobosa

Bohemoharpes naumanni

Idioglyptus

Protomya

Bohemoharpes ovatus

Idioglyptus stigmatus

Protopanderodus

Bohemoharpes ungula

Idiospira

Protopanderodus liripipus

Bohemoharpes vittatus

Idiostroma

Protophragmoceras

Bohemoharpes wilkensii

Ikella

Protophragmoceras erskinei

Boiotremus

Ildraites

Protophyllum

Boiotremus beraunensis

Ilionia prisca

Protopilophyllum

Boiotremus caelatus

Illaenoides

Protoscolex

Boiotremus distans

Illaenoides abnormis

Protospongia

Boiotremus incipiens

Illaenoides magnisulcatus

Protospongia columbiana

Boiotremus kosovensis

Illaenoscutellum

Protospongia conica

Boiotremus longitudinalis

Illaenoscutellum platiceps

Prototaxites

Bolbibollia

Illaenus

Protozeuga

Bolbineossia

Illaenus (Parillaenus) dalecarlicus

Protozeuga bicarinata

Bolbiprimitia

Illaenus (Parillaenus) roemeri

Protozyga

Bolbozoe

Illaenus avus

Protrochiscolithus

Bolicrinus

Illaenus dalecarlicus

Proturritella

Bollia

Illaenus linnarssoni

Proturritella historicum

Bonnemaia

Illaenus oviformis

Psarodictyum

Borealarges

Illionia

Psarodictyum attenuatum

Borealarges bucklandii

Ilmarinia ponderosa

Psarolepis

Borealarges calei

Imbricatoceras

Pseudamplexus

Borealarges fritillus

Imbricatoceras subundulatum

Pseudaristocystis

Borealarges mikulicorum

Imbricatocoelia

Pseudoamplexus

Borealarges morrisoni

Imperatoria irregularis

Pseudobelodella

Borealarges nicoae

Indaclor

Pseudobelodella silurica

Borealarges patulus

Indaclor sellarius

Pseudobelodina

Borealarges reedi

Innapora

Pseudobelodina dispansa

Borealarges renodis

Inocaulis

Pseudobelodina vulgaris

Borealarges simplex

Insignia

Pseudobirmanites

Borealarges tuckerae

Insolitignum

Pseudocheirurus

Borealarges variabilis

Insolitignum dissimile

Pseudocheirurus gomiensis

Borealarges warholi

Interproetus

Pseudoclimacograptus

Borealarges yulei

Intexodictyon

Pseudocolpomya miseneri

Borealis

Intexodictyon avitum

Pseudocolpomya modioliformis

Borealis cristiformis

Intexodictyon confertum

Pseudoconchidium

Borelasma

Intexodictyon laurenticum

Pseudoconchidium kozhimicum

Borelasma crassitangens

Intexodictyon olevi

Pseudocrinites

Borisella

Intexodictyon perplexum

Pseudocryptaenia

Borkopleura

Inversoceras

Pseudocryptaenia lahuseni

Botryocrinus

Iranospirifer

Pseudocryptophyllum

Boucia

Iranospirifer qarabilensis

Pseudocycloceras

Boucotides

Iridistrophia

Pseudocyrtodonta

Boucotinskia

Isbergia

Pseudocyrtodonta obtusa

Boucotinskia elongata

Isbergia planifrons

Pseudoduyunaspis

Boucotinskia sulcata

Ischadites

Pseudoduyunaspis bachuensis

Boucotspira lamellosus

Ischnacanthus

Pseudoentomozoe

Boucotspira wisbyensis

Ischnacanthus kingi

Pseudofletcheria

Bouskacrinus

Ischyrinia winchelli

Pseudohornera

Bowanophyllum

Ischyrodonta

Pseudohornera diffusa

Bowanophyllum ramosum

Ischyrodonta manitoulinensis

Pseudohornera orosa

Brachyaspis

Ischyrodonta unionoides

Pseudoimperatoria

Brachyaspis alacer

Isfarispira

Pseudoimperatoria media

Brachyaspis leptaenarum

Isfarispira perlata

Pseudoimperatoria minima

Brachyelasma estonicum

Isfarispira septata

Pseudolabechia

Brachymimulus

Isiola

Pseudoleda

Brachyopterella

Isochilina

Pseudolingula

Brachyopterus

Isocolus

Pseudolonchodina

Brachyprion

Isocolus sjogreni

Pseudolonchodina expansa

Brachyprion (Brachyprion) semiglobosa

Isorophus austini

Pseudomendacella

Brachyprion (Eomegastrophia) philomena

Isorophusella gutii

Pseudomeristina

Brachyprion (Erinostrophia) walmstedti

Isorthis

Pseudomonoclimacis

Brachyprion (Protomegastrophia) profunda

Isorthis (Arcualla) arcuaria

Pseudoniscus

Brachyprion arenaceus

Isorthis (Arcualla) boreaina

Pseudooneotodus

Brachyprion attenuata

Isorthis (Arcualla) microscapha

Pseudooneotodus beckmanni

Brachyprion compressa

Isorthis (Ovalella) arndellensis

Pseudooneotodus bicornis

Brachyprion kurzemensis

Isorthis (Ovalella) mackenziei

Pseudooneotodus boreensis

Brachyprion leda

Isorthis (Ovalella) natiscotekia

Pseudooneotodus coniformis

Brachyprion robustus

Isorthis crassa

Pseudooneotodus linguicornis

Brachytomaria

Isorthis festiva

Pseudooneotodus mitratus

Brachytomaria kindlei

Isorthis loveni

Pseudooneotodus tricornis

Brachytomaria papillosa

Isorthis mediocra

Pseudopachydictya

Brachytomaria turricula

Isorthis parvulus

Pseudophaulactis

Bracteoleptaena

Isorthis slitensis

Pseudopholidops

Brahmacrinus

Isorthoceras

Pseudophorus

Brevibelus

Isorthoceras curvilineatum

Pseudophorus cavus

Brevibelus breviformis

Isorthoceras dalecarlense

Pseudophorus profundus

Brevilamnulella

Isorthoceras elongatocinctum

Pseudophorus stuxbergi

Brevilamnulella kjerulfi

Isorthoceras junceum

Pseudopilophyllum

Brevilamnulella laevis

Isorthoceras suave

Pseudopilophyllum elegestum

Brevilamnulella thebesensis

Isorthoceras subcostatum

Pseudoplasmopora

Brevilamnulella umbosulcata

Isorthoceras wahlenbergi

Pseudoplegmatograptus

Breviseptum

Isospira

Pseudoproetus

Briantelasma

Isospira lepida

Pseudoprotathyris

Brianurus

Isospira reticulata

Pseudoprotathyris infantilis

Brianurus jeffersoni

Isotelus

Pseudorayella

Brockocystis

Isovella

Pseudoretiolites

Brockocystis nodosaria

Istorinus

Pseudorthograptus

Broeggeria

Istorinus erectus

Pseudosphaerexochus

Brongniartella

Ivanopleura

Pseudosphaerexochus cancrura

Brongniartella platynota

Ivoechiton

Pseudosphaerexochus conformis

Brongniartella robusta

Jahnia

Pseudosphaerexochus granulatus

Bronteopsis

Jahnia pelmen

Pseudosphaerexochus roemeri

Bronteopsis concentrica

Jamoytius

Pseudostrophochonetes

Brooksina

Janeia

Pseudotectus

Bryantodus

Janicula

Pseudotectus comes

Bubovicus

Janicula potens

Pseudotupolichas

Bubovicus tarda

Janiomya

Pseudotupolichas chicagoensis

Bucanella

Janius

Pseudotupolichas ornatus

Bucania

Janius barrandi

Psiloconcha grandis

Bucania bellapuncta

Janius exsul

Psiloconcha subovalis

Bucania groenlandica

Janius nobilis

Psilokirkbyella

Bucania robusta

Janius occidentalis

Psilokirkbyella prominens

Bucania simulatrix

Janussenia

Psilophytites

Bucania squamosus

Janussenia orangense

Pteraspis

Bucania stephnae

Japonoscutellum

Pterinea

Bucania stigmosa

Japonoscutellum geniculatum

Pterinea demissa

Bucanopsis

Japonoscutellum japonicum

Pterinea mclearni

Bucanopsis gemma

Japonoscutellum tunidum

Pterinea prolifica

Bucanopsis latevittatus

Jarovathyris

Pterinea waylandsmithi

Bucanopsis trisinuata

Jeppssonoceras

Pterinopecten

Bucanopsis volgulica

Jeppssonoceras concentratum

Pterochaenia

Bucanospira

Jezercia

Pterochitina

Bucanospira expansa

Jezercia rongi

Pteronitella

Bucanospira fractum

Jezercia wrighti

Pteronites

Bucanospira tuba

Jifarahpora

Pterophrentis

Buchiola

Jifarahpora libyensis

Pteropora

Bucucrinus

Jingshanella

Pteropora pennula

Bucucrinus isotaloi

Jingshanella surculosa

Pterospathodus

Bucucrinus saccus

Jinonicella

Pterospathodus amorphognathoides

Buffalopterus

Jinonicella kolebabai

Pterospathodus celloni

Bulbosohnia

Johntempleia

Pterospathodus eopennatus

Bulbosohnia bolboformis

Johntempleia pamae

Pterospathodus pennatus

Bullatella

Joldagiroceras

Pterospathodus rhodesi

Bumastoides

Joldagiroceras gyratum

Pterospermella

Bumastus

Joleaudella

Pterotheca anticostiana

Bumastus (Bumastella) aspera

Joleaudella mansuyi

Pterotheca avirostris

Bumastus (Bumastella) bipunctatus

Joleaudella perstriatus

Pterotheca hispanica

Bumastus (Bumastella) spiculus

Joleaudella yimgantauensis

Pterotheca mullochensis

Bumastus (Bumastus) glomerosus

Jolvia

Pterotheca multidecorata

Bumastus (Bumastus) subquadratus

Jonesea

Pterotheca trimerelloides

Bumastus agmakros

Jonesea cocksi

Pterygometopus

Bumastus barriensis

Jonesea grayi

Pterygometopus schmidti

Bumastus cuniculus

Jonesea undulata

Pterygotus

Bumastus dayi

Jonesina

Ptilillaenus

Bumastus graftonensis

Jonesites

Ptilodictya

Bumastus insignis

Jovacrinus

Ptilodictya bifurcata

Bumastus ioxus

Jovacrinus clarki

Ptilodictya canadensis

Bumastus kattoi

Jovacrinus jugum

Ptilodictya ensiformis

Bumastus niagarensis

Jovacrinus spinosus

Ptilodictya flabellata

Bumastus nudus

Jovellania

Ptilodictya flagella

Bumastus sakoi

Joviatrypa

Ptilodictya gladiola

Bumastus tenuis

Joviatrypa brabyla

Ptilodictya lanceolata

Bumastus vulsus

Jugiaster

Ptilodictya sulcata

Bunodes

Jugiaster speciosus

Ptilograptus

Burmeisteria

Jujuyops

Ptiloporella

Bursachitina

Junggarella

Ptilotrypa

Buskopora

Jupiterella

Ptomaspis

Buthotrephis

Jupiterella eumorpha

Ptomaspis canadensis

Buthotrephis gracilis

Kailia

Ptychocaulus

Butovicella

Kailia (Parakailia) lata

Ptychocaulus bivittata

Butovicella migrans

Kailiceras

Ptychocrinus

Byronoceras

Kalimnasphaera

Ptychocrinus mullochillensis

Byrsolopsina

Kalpinolepis

Ptychoglyptus

Byssonychia borealis

Kalpinolepis tarimensis

Ptychoglyptus ingenuus

Byssonychia grandis

Kamaena

Ptychomphalina

Byssonychia radiata

Kampecaris

Ptychomphalina inexpectata

Byssonychia richmondensis

Kampella

Ptychomphalina regulosa

Bythocypris

Kampella guttula

Ptychophyllum

Bythopora

Kanabinocrinus

Ptychopleurella

Bythotrephis

Kannathalepis

Ptychopleurella angulaticostata

Cadudium

Kannathalepis milleri

Ptychopleurella bouchardi

Caesariella

Kaseiella

Ptychopleurella emarginata

Calamopora alveolaris

Kaseiella laudabilis

Ptychopleurella erecta

Calamospora

Kassinella

Ptychopleurella lamellosa

Calapoecia

Kassinella (Kassinella) shiyangensis

Ptychopleurella lenzi

Calapoecia huronensis

Kastorcrinus

Ptychopleurella mediocostata

Calathium

Kastorcrinus chattertoni

Ptychopleurella multicostata

Calcaribeyrichia

Katastrophomena

Ptychopleurella transversa

Calceocrinus

Katastrophomena (Costistrophomena) magna

Ptychopleurella twenhofeli

Calceocrinus gamachicus

Katastrophomena (Katastrophomena) penkillensis

Ptychopleurella uniplicata

Calliocrinus

Katastrophomena antiquata

Ptychopteria

Calliops

Katastrophomena maxima

Ptychosphaera

Callipentamerus

Katastrophomena modesta

Ptychosphaera carinata

Callocladia

Katastrophomena parvicardinis

Ptychosphaera constricta

Callocystites

Katastrophomena penkillensis

Ptychosphaera ouralicus

Callograptus

Katastrophomena radiireticulata

Ptychospirina

Calloporella

Katastrophomena scabrosa

Ptychospirina senaria

Calloporella harrisi

Katastrophomena scotica

Ptyocephalus

Calloporina

Katastrophomena woodlandensis

Punctacheilinella

Calocyrtoceras

Katastrophomena zheganensis

Punctacheilinella macropunctata

Calocyrtocerina

Katoporodus

Punctatisporites

Calophyllum amalloides

Katoporodus timanicus

Punctoprimitia

Calostylis

Kayatia

Pustulocystis

Calostylis concavifundatus

Kayoceras

Pustulocystis ornatissimus

Calostylis luhai

Kayserella

Pustulocystis pentax

Calpichitina

Kenophyllum

Pycnactis

Calpichtina

Kenostrychus

Pycnactoides

Calycocoelia

Kenostrychus clementsi

Pycnodictyon

Calycocoelia micropora

Kentronetes

Pycnolithus

Calycocoelia typicalis

Kenzieana

Pycnomphalus

Calymene

Kenzieana cardiopsis

Pycnomphalus acutus

Calymene (Gravicalymene) angustior

Ketophyllum

Pycnomphalus colemani

Calymene ansensis

Kettneraspis

Pycnomphalus concurrens

Calymene barnesi

Kettneraspis copelandi

Pycnomphalus helicites

Calymene blumenbachi

Kettneraspis ramskoeldi

Pycnomphalus immaturus

Calymene blumenbachii

Kettneraspis wrightae

Pycnomphalus inflatus

Calymene breviceps

Kettnerites

Pycnomphalus obesus

Calymene celebra

Khalfinaea

Pycnomphalus placidus

Calymene clavicula

Kiaeria

Pycnosaccus

Calymene frontosa

Kiaeromena

Pycnostylus

Calymene gamachei

Kiaeromena (Kiaeromena) grandis

Pycnotrochus

Calymene hadyardensis

Kiaeromphalus

Pycnotrochus christiei

Calymene latigenata

Kiaeromphalus kristianiensis

Pycnotrochus prosper

Calymene mimaspera

Kiaeromphalus undiferus

Pycnotrochus viator

Calymene minimarginata

Kiaeropterus

Pygodus

Calymene nasuta

Kiangsuaspis

Pygolfia

Calymene niagarensis

Kiesowia

Pygolfia nina

Calymene nowlani

Kinaschukoceras

Pyrenomoeus cuneatus

Calymene orthomarginata

Kindleoceras

Pyrgocystis

Calymene polgari

Kindleoceras reversatum

Pyrgocystis cylindrica

Calymene retrorsa

Kindleoceras triangulare

Pyrgocystis sulcata

Calymene ubitquitosus

Kinnella

Pyrgocystis varia

Calymenella

Kinnella laurentiana

Qianbeilites

Calymenella bayani

Kinnella medlicotti

Qianomena

Calyptaulax

Kionelasma

Qianomena costata

Calyptaulax glabella

Kionoceras

Qianomena unicosta

Camarocrinus

Kionoceras coralliforme

Qilinyu

Camarotoechia

Kionoceras doricum

Qilinyu rostrata

Camarotoechia bimesiornata

Kionoceras muyagirum

Quadricarina

Camerella

Kionoceras virgatum

Quadricarina attava

Cameroceras

Kirkbyella

Quadricarina cancellata

Cameroceras regulus

Kirkidium

Quadricarina glandiformis

Cameroceras turrisoides

Kirkidium knighti

Quadricarina humillima

Campograptus

Kirkidium sculptum

Quadricarina scutulata

Campograptus harpago

Kirkirhynchus

Quadricarina senilis

Campograptus lobiferus

Kirkirhynchus reesidei

Quadricollina

Campophyllum

Kirkospira

Quadrifarius

Camptodictyon

Kirkospira glacialis

Quadrithyris

Camptodictyon penefastigiatum

Kirkospira tongassensis

Quasiaulacera

Camptolithus

Kirkospira vitellia

Quasiaulacera occidua

Canistrocrinus

Kitakamiia

Quasistrophonella

Canistrocrinus richardsoni

Kitakamiphyllum

Quepora

Canistrocrinus typus

Kjaerina

Quinquecosta

Cannapora

Kjaerina orvikui

Rabuloproetus

Cantrillia

Kjaerina poljensis

Radiaspis

Capelliniella

Kjerulfina

Radiastrea

Capnophyllum

Klakesia

Radiatodonta

Capulus

Klamathastraea

Radiolichas

Capulus haliotis

Klamathastraea dilleri

Radiolichas davedaviesi

Carcinosoma

Kloedenella

Radiolichas guttatus

Carcinosoma scoticus

Kobayashiconcha consolans

Radiolichas raydaviesi

Cardavia

Kochoceras

Radiotrypa

Cardavia cathleenae

Kockelella

Radiotrypa gothica

Cardavia hafi

Kockelella amsdeni

Radiurus

Cardavia stefani

Kockelella corpulenta

Radiurus adraini

Cardiola

Kockelella manitoulinensis

Radnoria

Cardiola bohemica

Kockelella ortus

Radnoria carlsi

Cardiola conformis

Kockelella patula

Radnoria humillima

Cardiola donigala

Kockelella ranuliformis

Radnoria syrphetodes

Cardiola geminans

Kockelella stauros

Rafanoglossa

Cardiola nina

Kockelella variabilis

Rafinesquina

Cardiola signata

Kockelella walliseri

Rafinesquina alternata

Cardiolinka

Kockelellamecdup

Rafinesquina latisculptilis

Cardiolita bohemica

Kodonophyllum

Rafinesquina mesicosta

Cardiolita conformis

Kodymites

Rafinesquina percensis

Cardiolopsis

Kodymites vulcanus

Rafinesquina ponderosa

Cardium

Koigia

Rafinesquina pseudoloricata

Carinariopsis

Kokenospira

Rafinesquina relicua

Carinaropsis

Kokenospira credibilis

Rafinesquina stropheodontoides

Carinophyllum

Kokomopterus

Rafinesquina ultrix

Carnalpia

Kolihaia

Rafinesquina urbicola

Carniodus

Kooptoonocrinus

Rakverella

Carniodus carnulus

Kopaninoceras

Rakverina

Carpocrinus

Kopaninoceras dorsatoides

Rakverina oanduensis

Carpospongia

Kopaninoceras jucundum

Ralfinella

Carpospongia castanea

Kopaninoceras thyrsus

Ramochitina

Carpospongia globosa

Koremagraptus

Ramulophyllum

Caryocaris

Kosoidea

Raphiophorus

Caryocaris cedarbergensis

Kosovina

Raphispira

Caryocrinites

Kosovina peeli

Raphispira plena

Caryocrinites ornatus

Kosovoceras

Raphistoma

Caryocystites

Kosovopeltis

Raphistomina

Caryocystites thorslundi

Kosovopeltis allaarti

Rastrites

Caryogyps

Kosovopeltis andersoni

Ravozetina

Caryogyps chattertoni

Kosovopeltis angusticostata

Ravozetina honorata

Caryogyps grayi

Kosovopeltis insularis

Receptaculites

Caryospongia

Kozelconcha

Recilites

Caryospongia tuberosa

Kozelconcha lipara

Recilites sylvestris

Casiogrammus

Kozelconcha obesa

Rectalloides

Casiogrammus ichthyeros

Kozlenia

Rectella

Cassowarioides

Kozlowskiellina

Rectograptus

Cassowarioides anisomorpha

Kozlowskiellina deltidialis

Rectograptus abbreviatus

Cassowarioides perryi

Kozlowskiellina strawi

Rectograptus amplexicaulis

Cassowarioides polgari

Kozlowskites

Rectograptus truncatus

Castellaroina

Kozlowskites gracilis

Redstonia

Castellaroina fascifer

Krameriella

Redstonia buskasi

Castellaroina telimelensis

Krameriella hornyi

Redstonia tercierae

Cataschisma

Krausella

Redstonia visbyensis

Cataschisma nitida

Krinocrinus

Reedops

Catatonocrinus

Ktenoura

Reimanophyllum

Catazone

Kullervo

Remopleurides

Catazone apate

Kullervo complectens

Remopleurides emarginatus

Catazone argolis

Kulumbella

Remopleurides minimus

Catazone changningensis

Kulumbella xacta

Remopleurides nikolaiseni

Catazone cingulata

Kungejophyllum

Renalcis

Catazone compressa

Kungejophyllum ajagusensis

Renalia

Catazone cuneus

Kuresaaria

Replicoskenidioides

Catazone demidoffi

Kurnamena rugosoides

Reptaria

Catazone latona

Kylixocrinus

Resserella

Catazone podolica

Kyphophyllum

Resserella basalis

Catazone robustula

Kyphophyllum greggi

Resserella canalis

Catazone styloidea

Kyphophyllum schmidti

Resserella elegantula

Catazyga

Kyreocrinus

Resserella impensa

Catazyga anticostiensis

Labechia

Resserella matutina

Catazyga cartieri

Labechia conferta

Resserella praeclara

Catazyga headi

Labechia prima

Resserella sabrinae

Catenipora

Labechiella

Reteograptus

Catenipora approximata

Labechiellata

Reteograptus geinitzianus

Catenipora arctica

Labechiina

Reteporina

Catenipora capilliformis

Labechiina arguta

Reticularia

Catenipora clausa

Labyrinthites

Reticulariopsis

Catenipora copulata

Labyrinthodictyon

Reticulatrypa

Catenipora crassaeformis

Labyrinthodictyon angulosum

Reticulograptus

Catenipora distans

Labyrinthosphaera

Retiolites

Catenipora elegans

Labyrinthosphaera macdonaldi

Retiolites geinitzianus

Catenipora escharoides

Laccoprimitia

Retipilina

Catenipora exilis

Laceripora

Retipilina knighti

Catenipora gotlandica

Lacunoporaspis

Retisacculus

Catenipora maxima

Ladacrinus

Retizitteloceras

Catenipora panga

Ladacrinus asynaptos

Retizitteloceras rarum

Catenipora septosa

Laeogyra

Retrorsirostra

Catenipora tapaensis

Laeogyra arvetensis

Retrorsirostra carleyi

Catenipora vespertina

Laeogyra gracilis

Retusotriletes

Catenipora workmanae

Laevicyphomena

Retzia

Cathaysiorthis

Lagarograptus

Retziella

Cathaysiorthis enorme

Lagenammina

Reuschella

Cathaysiorthis xichuanensis

Lageniocrinus

Reuschella inexpectata

Cathaysiorthis yushanensis

Lagenochitina

Reuschia

Cauliculospongia

Lalax bouchardi

Revalotrypa

Cauliculospongia solida

Lambeoceras

Revalotrypa honguedensis

Cavellina

Lambeophyllum

Reveroides

Celtencrinurus

Lamellaeoporella

Reversocypris

Centrifugus

Lamelliconchidium

Rexroadus

Centrifugus planorbis

Lamelliconchidium micropleura

Rexroadus kentuckyensis

Centrifugus procera

Lamontopterus

Rexroadus nathani

Cephalaspis

Lampadosocrinus

Rhabdelasma

Cephalograptus

Lamprophyllum

Rhabdochitina

Ceramophylla

Lamproscutellum

Rhabdocyclus

Ceramopora

Lampterocrinus

Rhabdoporella

Ceramopora berzelli

Lanarkia

Rhabdoporella catenularia

Ceramopora imbricata

Lanarkia horrida

Rhabdoporella glomerata

Ceramopora lindstromi

Lanarkopterus

Rhabdostropha

Ceramoporella

Lanceolatites

Rhabdostropha cancellata

Cerasina

Lanceomyonia

Rhabdostropha grindrodii

Cerasina antiquata

Langeites

Rhabdostropha leijiatunensis

Cerasina discoidalis

Lanthanaster

Rhabdostropha minuta

Ceratiocaris

Lanthanaster cruciformis

Rhabdostropha quinquecincta

Ceratocephala

Lapworthura

Rhabdotetradium

Ceratocephala goniata

Lapworthura miltoni

Rhabdotetradium frutex

Ceratocephala impedita

Lasanius

Rhactomena

Ceratocephalina

Lasiograptus

Rhaphidograptus

Ceratoikiscum

Lateranicrinus

Rhaphidograptus toernquisti

Ceratopea

Lateranicrinus saintlaurenti

Rhaphidophyllum

Ceratopora

Laticrura

Rhaphistoma vaurealense

Ceratopsis

Latiproetus

Rhapidophyllum

Ceratotheca

Laurelocrinus

Rhaxeros

Ceraurinus

Laurieipterus

Rhegmaphyllum

Ceraurinus icarus

Laurieipterus elegans

Rhenopyrgus

Cerauromeros

Laurucrinus

Rhenopyrgus piojoensis

Cerauromeros hydei

Laurucrinus sandtopensis

Rheocrinus

Ceraurus

Leangella (Leangella) america

Rheocrinus aduncus

Ceriaster

Leangella (Leangella) longae

Rhinidictya

Chabakovia

Leangella (Leangella) scissa

Rhinocarcinosoma

Chaetetes

Leangella (Leangella) segmentum

Rhinocarcinosoma dosonensis

Chaetetipora

Leangella cylindrica

Rhinopora

Chaetetipora ellesmerensis

Leangella scissa

Rhipidium

Chaetocladus

Leangella triangularis

Rhipidium tenuistriatum

Chaetosalpinx

Lecanocrinus

Rhipidognathus

Chamishaella

Lecanospira

Rhipidognathus symmetricus

Changxingaspis

Lechritrochoceras

Rhipidomella

Changxingaspis gui

Leda elliptica

Rhipidomella acutisulcata

Chaosocrinus

Ledopsis

Rhipidomella henryhousensis

Charactoceras

Leioclema

Rhipidomella oklahomensis

Charactoceras baeri

Leiocyamus

Rhipidomella subtriangularis

Charactoceras hercules

Leiofusa

Rhipidomena

Charactoceras raettvikense

Leiomarginata

Rhizophylloides

Charactoceras triangulum

Leiomarginata simplex

Rhizophyllum

Charactocrinus

Leiopecten

Rhodesispongia

Charactocrinus billingsi

Leiopteria

Rhodesispongia simplex

Charactocrinus pustulosus

Leiopteria opportuna

Rhombopora

Charitoxotis

Leiosphaeridia

Rhombopteria

Chasmatopora

Leiotriletes

Rhombopteria perunicola

Chasmatopora foerstei

Leleshusia

Rhombotrypa

Chasmatopora tenella

Leleshusia kiaeri

Rhopalocoma

Chavsakia

Lenatoechia

Rhopalocoma pyrotechnica

Cheilotrypa

Lentitheca

Rhynchognathodus

Cheilotrypa variolata

Leolasma

Rhyncholepis

Cheiopteria

Leolasma kaljoi

Rhynchonella

Cheiopteria glabra

Leonaspis

Rhynchonella exigua

Cheirocrinus

Leonaspis (Acanthalomina) minuta

Rhynchospirina

Cheirocrinus chrysalis

Leonaspis acarescola

Rhynchotrema

Cheirurus

Leonaspis angelini

Rhynchotrema fringilla

Cheirurus clasoni

Leonaspis centrina

Rhynchotrema nutrix

Cheirurus dilatatus

Leonaspis crenata

Rhynchotrema parviseptatum

Cheirurus niagarensis

Leonaspis leonhardi

Rhynchotrema perlamellosum

Cheirurus patens

Leonaspis lothiana

Rhynchotrema pulchellum

Cheirurus tornquisti

Leonaspis marklini

Rhynchotreta

Chelodes

Leonaspis muldensis

Rhynchotreta americaniformis

Chelodes actinis

Leonaspis mutica

Rhynchotreta gracilis

Chelodes bergmani

Leonaspis olini

Rhynobolus

Chenocrinus

Leonaspis rattei

Rhysostrophia

Chenocrinus canadaensis

Leonaspis roemeri

Rhytidoceras jovellanum

Chilobolbina

Leonaspis varbolensis

Rhytidorhachis

Chilotrypa

Leperditia

Rhytidorhachis guttuliformis

Chimaerastella

Leperditia caecigena

Rhytimya

Chiozoon

Leperditia glabra

Rhytimya emma

Chlamydophyllum

Leperditia manitoulinensis

Rhytimya kagawongensis

Choanoceras

Lepidactis

Rhytiodentalium

Choia

Lepidactis wenlocki

Rhytistrophia

Chonetes

Lepidaster

Richardsonoceras

Chonetoidea obliqua

Lepidaster grayi

Richardsonoceras sinuososeptatum

Chonophyllum

Lepidocentrus

Richmondoceras

Christiania

Lepidocoleus

Richmondoceras brevicameratum

Christiania dalarnensis

Lepidocycloides

Richterarges

Chronostrophonella

Lepidocycloides baikiticus

Richterarges aquilonius

Chronostrophonella terranova

Lepidocyclus

Richterarges ethnikos

Chrustenopora

Lepidocyclus erectus

Richterarges facetus

Chrustenopora askeriensis

Lepidocyclus rectangularis

Richterarges ormistoni

Chuanqianoproetus

Lepidoleptaena

Richterarges rolfei

Cicerocrinus

Lepidoleptaena poulseni

Richteria

Cicerocrinus anglicus

Lepocrinites

Riphaeolites

Cicerocrinus elegans

Leptaena

Ristnacrinus

Cimitaria

Leptaena (Leptaena) altera

Rivagraptus

Cimitaria liscina

Leptaena (Leptaena) bergstroemi

Rivularia

Cincinnetina

Leptaena (Leptaena) depressa

Rizoceras

Cincinnetina meeki

Leptaena (Leptaena) haverfordensis

Rizoceras acris

Cincinnetina multisecta

Leptaena (Leptaena) purpurea

Rizoceras inventum

Cinerocaris

Leptaena (Leptaena) rhomboidalis

Rizoceras rectum

Cinerocaris magnifica

Leptaena (Leptaena) trifidum

Romingerella

Cinerorthis

Leptaena (Leptaena) valentia

Romingerella estonica

Cingulochitina

Leptaena (Ygdrasilomena) roomusoksi

Romingerella major

Circophyllum

Leptaena aequalis

Romingeria

Cladochonus

Leptaena amelia

Romingeria nana

Cladodictya

Leptaena arberae

Rongxiella

Cladograpsus linearis

Leptaena argentina

Ropalonaria

Cladopora

Leptaena contermina

Rorringtonia

Cladopora perrara

Leptaena croma

Rorringtonia lenis

Cladopora seriata

Leptaena dejecta

Rorringtonia scanica

Cladospongia

Leptaena delicata

Rosenella

Cladospongia alaskensis

Leptaena electra

Rosenella dentata

Clarkeia

Leptaena gibbosa

Rosenella tuberculata

Clarkeipterus

Leptaena holcrofti

Rostricellula

Clarkeipterus testudineus

Leptaena lappa

Rostricellula rostrata

Clarkesvillia

Leptaena lappina

Rostricellula subtilicostata

Clathroceras

Leptaena lemniscata

Rostricellula transversa

Clathrochitina

Leptaena limbifera

Rotalites

Clathrodictyella

Leptaena nanaformis

Rotellomphalus tardus

Clathrodictyon

Leptaena odeon

Rothpletzia

Clathrodictyon adaverense

Leptaena oklahomensis

Rotundites

Clathrodictyon boreale

Leptaena orhor

Rotundites rotundus

Clathrodictyon caespitosum

Leptaena parvirugata

Roundya

Clathrodictyon clivosum

Leptaena parvissima

Rozhnovicrinus

Clathrodictyon crickmayi

Leptaena poulseni

Rozhnovicrinus isakarae

Clathrodictyon delicatulum

Leptaena provellerosa

Ruedemannia

Clathrodictyon demissum

Leptaena purpurea

Ruedemannia aberrans

Clathrodictyon gregale

Leptaena quadrata

Ruedemannia cognata

Clathrodictyon kudriavzevi

Leptaena quadrilatera

Ruedemannia crassior

Clathrodictyon lennuki

Leptaena rara

Ruedemannia holmi

Clathrodictyon lenticulare

Leptaena rhomboidalis

Ruedemannia laevissima

Clathrodictyon mammillatum

Leptaena richmondensis

Ruedemannia lirata

Clathrodictyon molense

Leptaena rugaurita

Ruedemannia robusta

Clathrodictyon plicatum

Leptaena sperion

Ruedemannia striatula

Clathrodictyon roseni

Leptaena valida

Ruedemannia subrobusta

Clathrodictyon sinuosum

Leptaena vellerosa

Ruedemannia tolli

Clathrodictyon sulevi

Leptaena zeta

Ruedemannipterus

Clathrodictyon turritum

Leptaena ziegleri

Rufispirifer

Clathrodictyon variolare

Leptaenisca

Rugosatrypa

Clathrodictyon vesiculosum

Leptaenisca irregularis

Rugosatrypa flexibilis

Clathrodictyon zonatum

Leptaenoidea

Rugosocyathocrinites

Clathropora

Leptaenoidea biohermica

Rugosocyathocrinites pauli

Clathrospira

Leptaenoidea rugata

Rugosocyathocrinites sanduskyensis

Clathrospira subconica

Leptaenoidea silurica

Rugosocyathocrinites striatissimus

Clavidictyon

Leptelasma

Rugosowerbyella

Clavofabella

Leptellina

Rukhinia

Clavofabellina

Leptellina (Merciella) mackenziensis

Rusophycus biloba

Cleionychia

Leptelloidea

Rutroclypeus

Cleionychia pulchella

Leptestiina

Ryckholtia

Clematocrinus

Leptobolbina

Saaremaaspis

Clematocrinus ramsbottomi

Leptocoelia

Saarolepis

Clidochirus

Leptodesma

Sabella

Clidophorus

Leptograptus

Saccelatia

Cliefdenella

Leptopoterion

Sactoceras

Cliefdenella alaskaensis

Leptorima

Sactoceras hadelandicum

Cliftonia

Leptorima oehlerti

Sactoceras manitoulinense

Cliftonia lamellosa

Leptorima townsendii

Sactoceras piso

Cliftonia obovata

Leptoskelidion

Sactorthoceras

Cliftonia oxoplecioides

Leptoskelidion loci

Saetograptus

Cliftonia psittacina

Leptoskelidion septulosum

Saffordophyllum

Cliftonia tubulistriata

Leptostrophia

Saffordotaxis

Climacograptus toernquisti

Leptostrophia affinalata

Sagenocrinites

Climacospongia

Leptostrophia antecedens

Sagittodontina

Climacospongia snowblindella

Leptostrophia beechhillensis

Sagittodontina robusta

Climacospongia undulata

Leptostrophia reedi

Sagittodontus

Climatius

Leptotrypa

Salacorthis

Clinoclimacograptus

Leptozone

Salairophyllum

Clinopistha

Leptozone esthetica

Salinocrinus

Clintiella

Lepyriactis

Salinocrinus conus

Clintonella

Lepyriactis nudus

Salopia

Clionychia rhomboidea

Lesueurilla

Salopina

Clionychia undata

Leurocycloceras

Salopina brandi

Clisiophyllum

Leurocycloceras etheridgii

Salopina conservatrix

Clisospira

Leurocycloceras raymondi

Salopina delta

Clonocrinus

Leurorthoceras

Salopina lunata

Clorilamnulella

Leurotrochoceras

Salopina pumila

Clorilamnulella osmundsbergensis

Levenea

Salopina sanjuanensis

Clorilamnulella undata

Levenea canaliculata

Salopina submedia

Clorinda

Levenea llandoveriana

Salopina tubulata

Clorinda parvolinguifera

Levenea media

Salpingostoma canadensis

Clorinda rotunda

Levenea qianbeiensis

Salpingostoma inornatum

Clorinda superundata

Levenea rica

Salpingostoma lata

Clorinda tumidula

Levicyathocrinites

Salpingostoma martinssoni

Coccaster

Levicyathocrinites sablensis

Salpingostoma orientalis

Coccaster bulbiferus

Levigatella

Salpingostoma richmondense

Coccoseris

Lichas

Salteropterus

Cochlichnus

Lichas affinis

Salvadorea

Cochlichnus anguineus

Lichas laciniatus

Sampo

Codiacrinus

Lichas menieri

Sampo ruralis

Codonocheilus

Lichenalia

Sampo transversa

Codonocheilus striatum

Lichenalia concentrica

Sanguinolites

Coelocaulus

Lichenaria

Sanguinolites drupa

Coelocaulus alceste

Licrophycus hudsonicum

Sapporipora

Coelocaulus chlupaci

Ligiscus

Sarcinula

Coelocaulus clavata

Ligiscus smithi

Sarmatotoxotis

Coelocaulus columna

Ligonodina

Saucrophyllum

Coelocaulus cybele

Ligulalepis

Saughina

Coelocaulus fugitiva

Ligulalepis yunnanensis

Saughina pertinax

Coelocaulus karlae

Liljevallia

Saukrodictya

Coelocaulus longispira

Liljevallia amorpha

Savagella

Coelocaulus perlonga

Liljevallia gotlandica

Savagella illinoisensis

Coelocaulus pollens

Liljevallia vieillensis

Scabbardella

Coelocaulus sana

Liljevallospira

Scabbardella altipes

Coelocaulus turritiformis

Liljevallospira elegantulus

Scaldianella

Coelocaulus zonaria

Liljevallospira tubulosa

Scalites richmondensis

Coelocerodontus

Limbatrypa

Scamnomena

Coelocerodontus trigonius

Limoptera

Scamnomena rugata

Coeloclema

Lindstroemia

Scenella

Coelocyclus

Lindstroemophyllum

Scenella conica

Coelocyclus groenlandicus

Lingula

Sceptropora

Coelocyclus novaki

Lingula (Palaeoglossa) perovata

Sceptropora estoniensis

Coelocyclus ornatus

Lingula (Pseudolingula) elegantula

Sceptropora facula

Coelocystis

Lingula allingi

Sceptropora florida

Coeloenellina

Lingula clintoni

Scharyia

Coelonella

Lingula cuneata

Scharyia heothina

Coelospira

Lingula forbesi

Scharyia micropyga

Coelospira hemispherica

Lingula lamellata

Scharyia nympha

Coelospira nitens

Lingula lata

Scharyia siceripotrix

Coelospira pusilla

Lingula minima

Schedohalysites

Coelozone

Lingula oblata

Schellwienella

Coelozone verna

Lingula ovata

Schistodictyon

Coenites

Lingulapholis

Schizocrania

Coenites juniperinus

Lingulasma

Schizocystis

Coleolus

Lingulella

Schizodus

Collarothyris

Lingulichnus

Schizonema

Collarothyris canaliculata

Linguocalymene

Schizonema capillatum

Colonograptus

Linguopugnoides

Schizophaulactis

Colpomya

Linochitina

Schizophorella

Colpomya audae

Linograptus

Schizophorella fallax

Colpomya balderi

Linoporella punctata

Schizophoria

Colpomya faba

Linostrophomena

Schizophoria (Eoschizophoria) hesta

Colpomya hugini

Liocalymene

Schizophoria (Schizophoria) impressa

Colpomya munini

Lioclemella

Schizoproetus

Colpomya vaki

Liocoelia

Schizoramma valentica

Columenoceras

Liolalax

Schizotreta

Columnaria calicina

Liospira

Schlotheimophyllum

Columnaxon

Liospira affinis

Schmidtomena

Columnostroma

Liospira cornovica

Schmidtomena acuteplicata

Colymbosathon

Liospira depressum

Schrenckia

Colymbosathon ecplecticos

Liospira lenticularis

Schuchertella

Comasphaeridium

Liospira perdepressa

Schuchertella propinqua

Comatopoma

Liospira progne

Schuchertia

Comatopoma sororia

Liospira simulans

Schuchertia wenlocki

Compacoleus

Liospira stevensoni

Schuchertoceras

Compsocrinus

Liostrophia glabra

Schuchertoceras troedssoni

Compsocrinus harrisi

Lissatrypa

Schugurocaris

Conbathella

Lissatrypa atheroidea

Scipionis

Concavodonta

Lissatrypa lithuanica

Scolopodus

Conchicolites

Lissatrypa obovata

Scolopodus insculptus

Conchidium

Lissatrypa sulcata

Scotiella

Conchidium bilocularis

Lissatrypella

Scotoharpes

Conchidium microlocularis

Lissidium

Scotoharpes consuetus

Condracypris

Lissocoelina

Scotoharpes domina

Conicocyathocrinites

Lissostrophia

Scotoharpes judex

Conicocyathocrinites wilsoni

Lissostrophia cooperi

Scotoharpes loma

Coniproetus

Lithophyllum

Scotoharpes molongloensis

Coniproetus ryckholti

Litocrinus

Scotoharpes raaschi

Conocardium

Lituigraptus

Scotoharpes sinensis

Conocardium richmondense

Lituigraptus convolutus

Scotoharpes telleri

Conochitina

Lituites

Scotoharpes trinucleoides

Conoclisa

Llandovacaste

Scotoharpes volsellatus

Conoclisa minuta

Llandovacaste birminghamensis

Scotoharpes willsi

Conoclisa schucherti

Lobocorallium

Scutellum

Conotoma

Lobograptus

Scyphophyllum

Conotoma bispiralis

Lobomelocrinus

Secuicollacta

Conotoma claustrata

Lockeia

Secuicollacta glaebosa

Conotoma eximia

Lockeia siliquaria

Secuicollacta malevola

Conotoma gradata

Loculipora

Secuicollacta vallipuellae

Conotoma pugnus

Lodenicia

Selenopeltis vultuosa

Constellaria

Loeblichia

Selenopeltoides

Constellatospongia

Loganellia

Sellinema

Constellatospongia pervia

Loganellia aldridgei

Sellinema frater

Contortophyllum

Loganellia cuneata

Semicorallidomus

Contracheirurus

Loganellia grossi

Semicorallidomus altidorsata

Contracheirurus errator

Loganellia matura

Semicorallidomus hians

Conularia

Loganellia scotica

Semicorallidomus whitfieldi

Cooksonia

Loganellia unispinata

Semicoscinium

Cooksonia hemisphaerica

Lonchidium

Semizona bella

Cooksonia pertoni

Lonchodina

Senticucullus

Coolinia

Lonchodina greilingi

Septatrypa

Coolinia applanata

Lonchodina walliseri

Septatrypa julia

Coolinia convexa

Lonchodomas

Septatrypa subaequalis

Coolinia gamachiana

Lonchodus

Septatrypa varians

Coolinia gracilis

Londinia

Septatrypa zelia

Coolinia pecten

Longiscula

Seretites

Copenychia

Longstaffia

Sericoidea

Copenychia franta

Longstaffia centervillensis

Serpentubina

Copenychia pristina

Longstaffia complexa

Serpentubina semperturbina

Corallidomus

Longstaffia cyclonema

Serpula

Coralloconchus

Longstaffia grata

Serpulites

Coralloconchus bragensis

Longstaffia laqueata

Severella arctosulcata

Corbuloceras

Longstaffia pulchra

Severella pinnigera

Cordatomyonia

Longstaffia teretiuscula

Shagamella

Cordatomyonia umangoensis

Longstaffia tubulosa

Shaleria

Cordylocrinus

Lophiostroma

Shaleria (Janiomya) ornatella

Cordylodus

Lophoctenella

Shaleria (Janiomya) parallelomya

Coremagraptus

Lophosphaeridium

Shaleria (Shaleriella) ezerensis

Cornellites

Lophospira

Shaleria dzwinogrodensis

Cornucrinus

Lophospira manitoulinensis

Shaleriella

Cornucrinus longicornis

Lophospira milleri

Shaninopsis

Cornucrinus mirus

Lophosteus

Shaninopsis acutirostris

Cornulites

Lordorthis variabilis

Shastaphyllum

Cornuodus

Loriolaster

Shastaphyllum schucherti

Cornuodus longibasis

Lovenicystis

Shensiphyllum

Cornuproetus

Lovenicystis angelini

Shideleroceras

Coronocephalus

Lovonemetrida

Shielia

Coronocephalus changningensis

Lowoceras

Shielia multispinata

Coronocephalus gaoluoensis

Loxobucania crassa

Sibirinka

Coronocephalus rongxiensis

Loxobucania ellisensis

Sibirinka amora

Coronocephalus tenuisulcatus

Loxonema

Sibiriolites

Coronograptus

Loxonema beraunense

Sibiriolites sibiricus

Corrugopora

Loxonema bertiense

Sibiritia

Corticulospongia

Loxonema boydii

Sichuanoceras

Corticulospongia floccosa

Loxonema costulatum

Sieberella

Corvaspis

Loxonema crispa

Sigmelasma

Corvaspis arctica

Loxonema debile

Sigmelasma peepi

Corvucrinus

Loxonema delicatula

Signetopsis

Corvucrinus schucherti

Loxonema fragillima

Silenis

Corymbospongia

Loxonema grayianum

Silfonocrinus

Corymbospongia adnata

Loxonema gregaria

Siljanostrophia

Corymbospongia mica

Loxonema gregarium

Siljanostrophia camerata

Corynotrypa

Loxonema hibernicum

Siljanostrophia jaanussoni

Corynotrypa dissimilis

Loxonema inexpectatum

Siluracmaea

Coryssognathus

Loxonema leda

Siluraster

Coryssognathus dubius

Loxonema magnum

Siluraster ketleyi

Coscinium

Loxonema obsoleta

Silurinka

Cosmiolithus

Loxonema obsoletum

Siluriphorus

Cosmogoniophora

Loxonema perlonga

Siluriphorus fulminatus

Cosmogoniophorina

Loxonema planatum

Siluriphorus gotlandicus

Costaegera

Loxonema plasi

Siluriphorus undulans

Costaledopsis

Loxonema pollens

Silurocidaris

Costatheca

Loxonema praecedens

Silurognathus

Costatulites

Loxonema praeteritum

Silurognathus maximus

Costatulites richmondensis

Loxonema propinquum

Silurolepis

Costilamnulella

Loxonema pseudofasciatum

Silurolepis platydorsalis

Costilamnulella valdari

Loxonema reedi

Silurovelella

Costistricklandia

Loxonema sinuosum

Similodonta

Costistricklandia brevis

Loxonema solvens

Similodonta spjeldnaesi

Costistricklandia gaspeensis

Loxonema strangulatum

Simplexodictyon

Costistricklandia lirata

Loxonema subangulatum

Sinacanthus

Costistrophomena

Loxonema torquatum

Sinacanthus wuchangensis

Crania anticostiana

Loxoplocus

Sinodiversograptus

Craniops

Loxoplocus gothlandicus

Sinogaleaspis

Craspedelia

Loxoplocus nelsonae

Sinogaleaspis shankouensis

Craspedobolbina

Loxoplocus sedgwicki

Sinogaleaspis xikengensis

Craspedostoma

Loxoplocus soluta

Sinogaleaspis zhejiangensis

Craspedostoma elegantulum

Ludictyon

Sinopora

Craspedostoma filistriatum

Ludlovia

Sinopora callosa

Craspedostoma glabrum

Ludlovia multispora

Sinopora operta

Craspedostoma spinulosum

Luhaia

Sinuitina

Craspedostoma tuba

Luhaia candelabra

Sinuitina matuta

Crassatrypa

Lumbriconereites

Sinuitopsis

Crassilasma

Lumectospongia

Sinuitopsis hornyi

Crassiproetus

Lumectospongia uncinata

Sinuitopsis subquadrata

Crassiproetus turgidus

Lunulacardium

Sinuspira

Crassitestella

Luojiashania

Sinutropis

Crassitestella reedi

Luxocrinus

Sinutropis esthetica

Crateroceras

Lyecoceras

Sinutropis interrumpens

Craterophyllum

Lygdozoon

Siphonocrinus

Craticula

Lyonicrinus

Siphonolasma

Craticula gotlandica

Lyopora goldfussi

Siphonotreta

Crepidosoma

Lyriocrinus

Siskiyouspira

Crepidosoma doylei

Lyrodesma

Siskiyouspira vostokovae

Crepidosoma wenlocki

Lyrodesma postplanum

Skenidioides

Crepipora

Lyrodesma poststriatum

Skenidioides acutum

Crinobrachiatus

Lysocystites

Skenidioides asteroidea

Crispella

Lythophyllum

Skenidioides hymiri

Cromatrypa

Lytospira

Skenidioides lewisii

Cromatrypa pubes

Lytospira arcuata

Skenidioides multifarius

Cromus

Lytospira nitida

Skenidioides operosa

Cronyphyllum

Lytospira tangens

Skenidioides petrasi

Crotalocephalus

Machaeraria

Skenidioides scoliodus

Crotalocrinites

Mackenziephyllum

Skenidioides woodlandiensis

Crotalocrinites rugosus

Mackenziurus

Skenidium

Crozonaspis dujardini

Mackenziurus lauriae

Skolithos linearis

Cruziana

Mackerrovia

Slava

Cruziana problematica

Mackerrovia jinei

Slava sathon

Cryptocycloceras

Maclurea

Slavinka

Cryptograptus

Maclurina

Sleia

Cryptograptus tricornis

Maclurina manitobensis

Slependia

Cryptolithus

Macluritella

Slimonia

Cryptophyllus

Maclurites

Slimonia dubia

Cryptospira intraplicata

Maclurites altus

Sluha

Cryptothyrella ovoides

Maclurites borealis

Sluha kosoviensis

Cryptothyrella terebratulina

Maclurites gravis

Sluzka

Ctenobolbina

Maclurites magna

Sluzka ovulum

Ctenoceras

Maclurites magnus

Snoopyia

Ctenocrinus

Maclurites ovalis

Sokoloviella

Ctenodonta

Maclurites triangularis

Sokoloviella delicata

Ctenodonta iphigenia

Macrocypris

Solariproetus

Ctenodonta nasuta

Macrodesma

Solariproetus prosthemesos

Ctenodonta subcircularis

Macrodesma enigma

Solariproetus shichengziensis

Ctenodonta victoriae

Macronotella

Solemya

Ctenodontella

Macropleura

Solenomorpha

Ctenognathodus

Macrostylocrinus

Solenopleura

Ctenognathodus confluens

Macrypsilon

Solenopora

Ctenognathodus jeppssoni

Macurdablastus uniplicatus

Sollasina

Ctenognathodus murchisoni

Madygenia brachypyga

Sollasina cthulhu

Ctenopleuron

Madygenia communis

Sollasina woodwardi

Ctenopterus

Maelonoceras

Somersetella

Cucullograptus

Malgaoceras

Somersetella amplia

Culicocrinus

Malgaoceras moniliforme

Somersetella conicula

Cuneamya

Malumispongium

Somersetella digitata

Cuneamya miamiensis

Malumispongium cornwallisi

Somphopora

Cuneatopora

Maminka

Songkania

Cupitheca

Mandaloceras

Songkanoceras

Cupularostrum

Manicrinus

Songxites

Cupulocorona

Manitoulinoceras gyroforme

Soomaspis

Cupulocrinus

Manitoulinoceras lysander

Sorosphaera

Curriella

Manitoulinoceras postumius

Sowerbyella

Curtognathus

Manosia

Sowerbyella (Rugosowerbyella) ambigua

Cyamella

Manticrinus

Sowerbyella (Rugosowerbyella) dianbianensis

Cyamops stensioei

Manulicula

Sowerbyella (Sowerbyella) sericea

Cyathactis

Maoristrophia

Sowerbyella gigantea

Cyathactis balticus

Maquoketocrinus

Sowerbyella sladensis

Cyathactis gazellensis

Maquoketocrinus ornatus

Spanila

Cyathaspis

Margachitina

Spathognathodus

Cyathaspis acadica

Mariacrinus

Spathognathodus celloni

Cyathaxonia

Marklandella

Spathognathodus dubius

Cyathochitina

Marklandella markesi

Spathognathodus fundamentus

Cyathocrinites

Marsipograptus

Spathognathodus pennatus

Cyathocrinus

Marsipograptus percensis

Spatiopora

Cyathodictya

Marsupiocrinus

Sphaerexochus

Cyathophycus

Marsupipterus

Sphaerexochus bridgei

Cyathophycus akiensis

Marsupipterus sculpturatus

Sphaerexochus calvus

Cyathophycus mackenziensis

Maryonychia

Sphaerexochus dimorphus

Cyathophylloides

Maryonychia concordensis

Sphaerexochus glaber

Cyathophyllum

Mastigobolbina

Sphaerexochus granulatus

Cyathotheca

Mastigocrinus

Sphaerexochus hiratai

Cyathotheca suecica

Mastigocrinus bravoniensis

Sphaerexochus johnstoni

Cybantyx

Mastigograptus

Sphaerexochus laciniatus

Cybelecrinus

Mastopora foederata

Sphaerexochus latifrons

Cybelecrinus ladas

Mastopora incrustata

Sphaerexochus planirachis

Cybelecrinus nebros

Matteolaspongia

Sphaerexochus romingeri

Cyclendoceras

Matteolaspongia hemiglobosa

Sphaerexochus scabridus

Cycloceras

Maurotarion

Sphaerina

Cycloceras olorus

Mausoleaster

Sphaerirhynchia

Cyclocrinites

Mazaphyllum

Sphaerirhynchia wilsoni

Cyclocrinus

Mclearnites

Sphaerochitina

Cyclocyclicus

Meadowtownella

Sphaerocodium

Cyclocyrtonella

Medfracaulus

Sphaerocoryphe

Cyclocyrtonella eremita

Medfracaulus contracta

Sphaerocoryphe kingi

Cyclogranisporites

Medfracaulus cooki

Sphaerocoryphe punctata

Cyclograptus

Medfracaulus turriformis

Sphaerocyclus

Cyclonema

Medfrazyga

Sphaerocyclus tuber

Cyclonema (Cyclonema) hiiumaa

Medfrazyga gilmulli

Sphaerocystites

Cyclonema ampullosum

Medinaster

Sphaeronites (Peritaphros) variabilis

Cyclonema ananas

Medusaegraptus

Sphaerorthoceras

Cyclonema apicatum

Megakozlowskiella

Sphaerorthoceras beatum

Cyclonema bilix

Megakozlowskiella cooperi

Sphaerotocrinus

Cyclonema boreale

Megakozlowskiella perlamellosa

Sphenolium

Cyclonema canaliculata

Megalomoidea

Sphenosphaera

Cyclonema cancellatum

Megalomphala

Sphenosphaera centervillensis

Cyclonema cives

Megalomphala dawesi

Sphenosphaera consimilis

Cyclonema composita

Megalomphala gotlandica

Sphenosphaera eiseni

Cyclonema consepultum

Megalomphala marjorae

Sphenosphaera fiscellostriata

Cyclonema convergens

Megalomphala septentrionale

Sphenosphaera laurentinus

Cyclonema crebristria

Megalomphala taenia

Sphenosphaera opertus

Cyclonema daytonensis

Megalomphala wilfredi

Sphenosphaera subangularis

Cyclonema decora

Megamyonia

Sphenothallus

Cyclonema delicatula

Megamyonia arethusa

Sphenotomorpha

Cyclonema delicatulum

Megamyonia breviuscula

Sphenotreta

Cyclonema dowlingii

Megamyonia gracilis

Sphooceras

Cyclonema fasciata

Megamyonia knighti

Sphooceras truncatum

Cyclonema filicinctus

Megamyonia vaurealensis

Sphyradoceras

Cyclonema formosum

Megastrophia

Spinachitina

Cyclonema gyronemoides

Megastrophia (Eomegastrophia) acanthoptera

Spinatrypa

Cyclonema humerosum

Megastrophia (Eomegastrophia) paskoiacensis

Spinatrypina

Cyclonema infrequens

Meifodia

Spinatrypina tubulosa

Cyclonema karlsteinensis

Meifodia prima

Spinicharybdis

Cyclonema lepidula

Meifodia subundata

Spinicharybdis billingsi

Cyclonema modestum

Meifodia tulkulensis

Spinicharybdis boucoti

Cyclonema niagarensis

Meishanaspis

Spinicharybdis canteriata

Cyclonema parvimedium

Meishanaspis lehmani

Spinicharybdis elora

Cyclonema percingulatum

Meitanillaenus

Spinicharybdis frenata

Cyclonema servus

Melbournopterus

Spinicharybdis gasconsensis

Cyclonema thalia

Melbournopterus crossotus

Spinicharybdis krizi

Cyclonema timida

Melocrinites

Spinicharybdis wilsoni

Cyclonema timidum

Mendacella

Spinobairdia

Cyclonema trepidans

Mendacella aerinensis

Spinochonetes

Cyclonema varians

Mendacella bleikeriensis

Spinodus

Cyclonema varicosa

Mendacella circularis

Spinograptus

Cyclonema varicosum

Mendacella lata

Spirifer

Cyclonema varispirum

Mendacella megacircularis

Spirifer insignis

Cyclora

Mendacella mullockiensis

Spiriferina

Cyclospira

Mendacella phiala

Spirigerina

Cyclospongia discus

Mendacella sola

Spirigerina (Eospirigerina) gaspeensis

Cyclotheca bohemica

Mendacella uberis

Spirigerina copperi

Cyclotropis vellerosa

Mendacella udauberis

Spirigerina marginalis

Cyclotrypa

Mercedescaudina

Spirigerina quinquecostata

Cylicocrinus

Mercedescaudina mostleri

Spirigerina supramarginalis

Cymatelasma

Merciella

Spirina

Cymatiosphaera

Mericoceras

Spirina antiquata

Cymatonota

Merista

Spirina patula

Cymatonota prolata

Merista cuneatina

Spirinella

Cymatonota semistriata

Merista oklahomensis

Spirinella caecistriata

Cymatonota typicalis

Merista rhombiformis

Spirinella struszi

Cymbidium

Meristella

Spirinella tureki

Cymbidium acutum

Meristina

Spirograptus

Cymbidium kirki

Meristina maria

Spiroraphe aequilatera

Cymbularia

Meristina podolica

Spiroraphe bohemica

Cymbularia bullatus

Meristocrinus

Spiroraphe cryptata

Cymbularia decipens

Meristocrinus orbignyi

Spiroraphe galtensis

Cymbularia decorata

Meristoschisma

Spiroraphe pollens

Cymbularia merita

Meristospira

Spiroraphe putillus

Cymbularia nuciformis

Merocycloceras

Spiroraphe shelvensis

Cymbularia turnbulli

Meroperix

Spirorbis

Cymbularia woodlandensis

Mesocoelia

Spirorbis cincinnatiensis

Cymostrophia

Mesocoelia delicata

Spondylopyxis

Cyphaspis

Mesocoelia discrepans

Spongiostroma

Cyphocrinus

Mesocoelia gregaria

Spongiostroma dalecarlica

Cyphomenoidea

Mesocoelia iners

Spongophylloides

Cyphomenoidea bella

Mesocoelia janus

Spongophyllum

Cyphomenoidea wisgoriensis

Mesocoelia libera

Spurispirifer

Cyphoniscus

Mesocoelia suspecta

Spyroceras

Cyphoniscus socialis

Mesocoelia terebrans

Spyroceras damesi

Cyphoproetus

Mesoculipora

Squamathyris

Cyphoproetus comitilus

Mesodouvillina

Squameofavosites

Cyphoproetus latiaxis

Mesofavosites

Squameofavosites squamuliferus

Cyphoproetus pugionis

Mesofavosites alveolitoides

Squameolites

Cyphoproetus svartoensis

Mesofavosites bonus

Starnikoviella

Cyphotrypa

Mesofavosites dualis

Starnikoviella settedabanica

Cypricardella

Mesofavosites fleximurinus

Staufferella

Cypricardinia

Mesofavosites fortis

Stauria

Cypricardinia dalecarlica

Mesofavosites imbellis

Staurocephalites

Cypridina

Mesofavosites inferior

Staurocephalus

Cyrtia

Mesofavosites kiltsiensis

Staurocephalus murchisoni

Cyrtia alatiformis

Mesofavosites multiporus

Staurocephalus trichochin

Cyrtia exporrectus

Mesofavosites obliquus

Staurocystis

Cyrtina

Mesofavosites pulchrum

Stauromatidium

Cyrtoceras

Mesofavosites secundus

Steganotheca

Cyrtocycloceras

Mesofavosites silicificatus

Steganotheca striata

Cyrtodiscus

Mesofavosites similis

Stegerhynchella

Cyrtodiscus evolvens

Mesofavosites validus

Stegerhynchus

Cyrtodonta

Mesoleptostrophia

Stegerhynchus antiqua

Cyrtodonta exigua

Mesoleptostrophia (Mesoleptostrophia) filosa

Stegerhynchus borealis

Cyrtodonta kagawongensis

Mesoleptostrophia cocksi

Stegerhynchus concinna

Cyrtodonta ovalis

Mesoleptostrophia filosa

Stegerhynchus diodontus

Cyrtodonta plebia

Mesopalaeaster wilberanus

Stegerhynchus estonicus

Cyrtodonta ponderosa

Mesopholidostrophia

Stegerhynchus peneborealis

Cyrtodonta sigmoides

Mesopholidostrophia fletcheri

Stegerhynchus praecursor

Cyrtodonta suecica

Mesopholidostrophia laevigata

Stegerhynchus pseudobidentatus

Cyrtodontula

Mesopholidostrophia nitens

Stegerhynchus pusillum

Cyrtodontula subtruncata

Mesopholidostrophia salopiensis

Stegerhynchus vicina

Cyrtodontula truncata

Mesosolenia

Stegocornu

Cyrtogomphoceras

Mesotaphraspis

Stegocornu procerum

Cyrtograptus

Mesotrypa

Stelckaspis

Cyrtolites

Metacalymene

Stelckaspis perplexa

Cyrtolites hornyi

Metaclimacograptus

Stellipora

Cyrtolites inprobus

Metaconularia

Stellipora constellata

Cyrtolites occultus

Metadictya

Stelliporella

Cyrtolites ornatus

Metaleiolichas

Stelliporella podolica

Cyrtolites rugosus

Metaleiolichas tuberculatus

Stellopora

Cyrtolites seminulum

Metambonites meritus

Stelodictyon

Cyrtolites sinuosus

Metapalaeoneilo

Stenaster

Cyrtolites tuboides

Metapalaeoneilo dromon

Stenaster obtusus

Cyrtonella

Metaplasia

Stenoblepharum

Cyrtophyllum

Metarizoceras

Stenoblepharum norvegicum

Cyrtorizoceras

Metarmenoceras

Stenoblepharum pentagonoides

Cyrtorizoceras thorslundi

Metaspyroceras

Stenoblepharum striatum

Cyrtospira

Metoptoma

Stenoblepharum warburgae

Cyrtospira directus

Metoptoma alceste

Stenogomphoceras

Cyrtospira funata

Mezounia

Stenoloron

Cyrtospira inexpectata

Michelia

Stenoloron areyi

Cyrtospira notata

Michelia persimilis

Stenoloron fasciata

Cyrtospira ventricosus

Michelia tenera

Stenoloron linnarssoni

Cyrtostropha

Michelia whiteavesi

Stenoloron sulcatula

Cyrtostropha bicincta

Michelinia

Stenopareia

Cyrtostropha cava

Michelinoceras

Stenopareia acymata

Cyrtostropha coralli

Michelinoceras alticameratum

Stenopareia catathema

Cyrtostropha macrospira

Michelinoceras currens

Stenopareia duffyae

Cyrtostropha monoliniformis

Michelinoceras michelini

Stenopareia glochin

Cyrtostropha morinensis

Michelinoceras mizobuchii

Stenopareia grandis

Cyrtostropha pacifica

Micrhystridium

Stenopora

Cyrtostropha sculpta

Micrhystridium stellatum

Stenorhynchia

Cyrtostropha subplicata

Microbilobata

Stenorhynchites

Cystihalysites

Microbilobata avalanchensis

Stephanocrinus

Cystihalysites deplanatus

Microcardinalia

Stephanocrinus angulatus

Cystipaliphyllum

Microcardinalia (Chiastodoca) estonica

Stephanocrinus ramsbottomi

Cystiphorolites

Microcardinalia (Chiastodoca) richardsoni

Stereoaster

Cystiphylloides

Microcardinalia (Chiastodoca) salterii

Steusloffina

Cystiphyllum

Microcardinalia (Dauphinella) melissa

Sthenarocalymene

Cystiphyllum visbyense

Microcheilinella

Stibarocrinus

Cystistroma

Microchilina

Stictopora

Cystistroma canadense

Micromitra

Stictopora nitidula

Cystocerium

Microplasma

Stictopora parvula

Cystograptus

Microscutellum

Stictoporella

Cystostroma prodigiosum

Microscutellum primigenium

Stictotrypa

Cystothalamiella

Microsphaeridiorhynchus

Stigmatella

Cystothalamiella alaskaensis

Microsphaeridiorhynchus hercostomaticum

Stigmosphaerostylus

Cystothalamiella ducta

Microsphaeridiorhynchus litchfieldensis

Stimulograptus

Cystothalamiella irregularis

Microsphaeridiorhynchus nucula

Stipatocrinus

Cystothalamiella tuboides

Microspongia

Stipatocrinus hulveri

Cytherella

Mictocystis

Stipespongia

Cytherellina

Mictospirifer

Stipespongia laminata

Cytocrinus

Miculiella

Stiptocrinus

Dactylogonia

Migmatophyllum

Stoermeropterus

Daidia

Mila

Stoermeropterus conicus

Daidia cerithioides

Mila parvula

Stokesoceras

Daidia peculiaris

Mimella

Stolidotus

Daidia wilsonae

Mimella zhejiangensis

Stolidotus marco

Dalaspis

Mimerodonta

Stomatograptus

Dalaspis boltoni

Mimerodonta atlei

Stomatopora

Dalaspis pustulosa

Mimerodonta njordi

Stortophyllum

Dalecarlioceras

Mimerodonta phaseolus

Strandoceras orvikui

Dalecarlioceras dalecarlicum

Mimocryphaeus

Straparollina

Daleiella

Mimospira

Straparollina eurydice

Dalejina

Mimospira cochleata

Straparollina infida

Dalejina hybrida

Minutomena

Straparollus

Dalejina junonis

Minutomena yichangensis

Straparollus complanans

Dalejina phaseola

Miraspis

Straparollus fragilis

Dalejina striata

Miraspis cardiolarum

Straparollus honoratus

Dalmanella

Miraspis cornuta

Streptaster nodosus

Dalmanella cicatrica

Miraspis mira

Streptelasma

Dalmanella cyclica

Miraspis solbergensis

Streptelasma (Streptelasma) giganteum

Dalmanella edgewoodensis

Mirorgraptus

Streptelasma cyrtum

Dalmanella manitoulinensis

Mirorthis

Streptelasma dispandum

Dalmanella pectinoides

Mirorthis mira

Streptelasma ostrogothicum

Dalmanella rosensteinae

Miscellanea

Streptelasma primum

Dalmanella sculpta

Mitoclema

Streptis

Dalmanella testudinaria

Mitroceras

Streptis altosinuata

Dalmanites

Mitrocystites

Streptis grayii

Dalmanites caudatus

Mixopterus

Streptis monilifera

Dalmanites jupiterensis

Mjoesina moorei

Streptocrinus

Dalmanitina

Mochtyella

Streptograptus

Dalmanophyllum

Modesta

Streptograptus antennularius

Damilina

Modiodonta

Streptorhynchus

Damilina laevigata

Modiolodon kagawongensis

Streptotrochus

Damilina subrotunda

Modiolopsis

Streptotrochus amicus

Damilina umbo

Modiolopsis alvae

Streptotrochus cyclostoma

Danoceras

Modiolopsis brevantica

Streptotrochus incisus

Danoceras scandinavicum

Modiolopsis exilis

Streptotrochus mercurius

Dapsilodus

Modiolopsis leptaenarum

Streptotrochus rugulosus

Dapsilodus hamari

Modiolopsis manitoulinensis

Strepula

Dapsilodus mutatus

Modiolopsis modiolaris

Striatocycloceras

Dapsilodus obliquicostatus

Modiolopsis orthoconcavus

Striatocycloceras foerstei

Dapsilodus praecipuus

Modiolopsis ovata

Striatocycloceras isbergi

Dapsilodus sparsus

Modiolopsis vera

Striatopora

Dasycladacea

Modiomorpha

Striatopora flexuosa

Dasyporella

Molinicola

Stricklandia gwelani

Dasyporella silurica

Molinicola bohemica

Stricklandia lens

Dawsonoceras

Molinicola gotlandica

Stricklandiella

Dawsonoceras annulatum

Molongia

Striispirifer

Dawsonoceras fenestratum

Mongoceras

Striispirifer niagarensis

Dawsonoceras fimbriatum

Mongoceras angustum

Striispirifer plicatellus

Dawsonoceras gregarium

Monoceratella

Striispirifer striolatus

Dawsonoceras hyatti

Monoclimacis

Strixella

Dawsonocerina

Monocostodus

Strobeus

Dayia

Monograptus

Strobilopterus

Dayia navicula

Monograptus bouceki

Strobilopterus laticeps

Dayongaspis

Monograptus priodon

Stromatocerium

Dayongaspis hunanensis

Monograptus transgrediens

Stromatocerium huronense

Daytonia

Monograptus yukonensis

Stromatocerium rugosum

Daytonia jollieti

Monolaminospongia

Stromatopora

Dazhucrinus

Monolaminospongia gigantia

Stromatopora prima

Dceruska

Monomerella

Stromatoporella

Decaschisma

Monopleurodus

Strombodes

Deceptrix

Monopleurodus ohhesaarensis

Strombodes middendorfi

Decipilites

Monorakos kledos

Strombodes schrencki

Decoriconus

Monotrypa

Strombodes tuvensis

Decoriconus fragilis

Monotrypa osgoodensis

Stropheodonta

Decorochilina

Monotrypa sinuosa

Strophochonetes

Decorochilina bohemica

Monotrypella

Strophochonetes cingulatus

Decorochilina cancellata

Monticulipora

Strophochonetes cornutus

Decorochilina dispar

Morania attenuatum

Strophochonetes newlandensis

Decoroproetus

Morania declivis

Strophodonta

Decoroproetus asellus

Morania nixonforkensis

Strophodonta (Strophodonta) hoburgensis

Decoroproetus bodae

Morania paradoxa

Strophodonta corrugata

Decoroproetus campanulatus

Morania vsinuata

Strophomena

Decoroproetus decorus

Morania wagneri

Strophomena arcuata

Decoroproetus evexus

Morinorhynchus

Strophomena concordensis

Decoroproetus farragatus

Morinorhynchus adnatus

Strophomena huronensis

Decoroproetus granulatus

Morinorhynchus crispus

Strophomena maysvillensis

Decoropugnax

Morinorhynchus dalmanelliformis

Strophomena nutans

Decoroscutellum

Morinorhynchus miniparvicostellus

Strophomena pectenoides

Dedzetina

Morinorhynchus orbignyi

Strophomena philomela

Dedzetina silurica

Morinorhynchus rubeli

Strophomena planoconvexa

Deiphon

Morinorhynchus wieniukowi

Strophomena planumbona

Deiphon angelini

Moroccopyrgus

Strophomena rugosa

Deiracorallium

Moroccopyrgus matacarros

Strophomena satterfieldi

Deiracorallium angulatum

Morphotropis

Strophomena vetusta

Deiroceras

Morphotropis aliena

Strophonella

Dekayella

Morphotropis bohemica

Strophonella (Quasistrophonella) haueri

Dekayia

Morphotropis capillosa

Strophonella alterniradiata

Deliella

Morphotropis discreta

Strophonella extensa

Deloprosopus

Morphotropis helicina

Strophonella gippslandica

Deloprosopus jiangshanensis

Morphotropis nitidissimum

Strophonella laxiplicata

Delops

Morphotropis procera

Strophonella loeblichi

Delotaxis

Morphotropis tremulans

Strophonella patenta

Deltacrinus

Mourlonia

Strophonella semifasciata

Delthyris

Moyerella

Strophoprion euglypha

Delthyris elegans

Moyerella parva

Strophoprion geniculatum

Delthyris elevata

Moyerella stellata

Strophostylus

Demirastrites

Moyerocanoceras

Strophostylus cancellata

Denckmannites

Moyerocanoceras sulcatum

Strophostylus cyclostomus

Dendrocrinus

Mucophyllum

Strophostylus elevatus

Dendrocrinus leptos

Mucronaspis grandis

Strosipherus

Dendrocrinus longidactylus

Mucronaspis mucronata

Struszia

Dendrograptus

Mucteoceras

Struszia petebesti

Densastroma

Mucteoceras bilobatum

Struveria

Densastroma pexisum

Mulceodens

Stuertzaster

Densiphyllum

Mulceodens aequicostatus

Stuertzaster marstoni

Dentalium

Mulceodens foxi

Sturtzaster

Dentalium hecetaensis

Mulceodens jaanussoni

Stygina

Dentilasma

Mulceodens johnstoni

Stygina angustifrons

Derivatolites

Mulceodens schneideri

Stygina latifrons

Desmacriocrinus

Mulceodens wilsoni

Styliolina

Desmidocrinus

Multicostella

Stylocrinus

Desmidodictyon

Multioistodus

Stylonema

Desmidodictyon exoticum

Multiplicisphaeridium

Stylonema arachne

Desmidopora

Multisolenia

Stylonema commutatum

Desmochitina

Multisolenia excelsa

Stylonema domina

Desmograptus

Multisolenia extrema

Stylonema mater

Desmorthis

Multisolenia temperans

Stylonema oppositum

Desmostroma

Multisolenia tortuosa

Stylonema placidum

Desmostroma chutense

Multisolenia tortuosaeformis

Stylonema potens

Desmostroma mongolica

Multispinula bondarevi

Stylonema solitarium

Desquamatia

Multithecopora

Stylonema styloideum

Destombesium

Murchisonia (Goniospira) gracillima

Stylonema transiens

Destombesium ellipsoides

Murchisonia aciculata

Stylonurella

Destombesium zagoraensis

Murchisonia allevata

Stylonuroides

Deunffia

Murchisonia bilineata

Stylonurus

Devonozyga

Murchisonia conradi

Stylopleura

Devonozyga conicum

Murchisonia deflexa

Stylostroma

Diabolirhynchia

Murchisonia dudleyensis

Stylostroma flabellatum

Diacalymene

Murchisonia laphami

Subalveolitella

Diacalymene gabrielsi

Murchisonia minuta

Subalveolitella majuscula

Diacalymene lesperancei

Murchisonia mylitta

Subalveolitella minuscula

Diacalymene schucherti

Murchisonia obtusangula

Subalveolitella repentina

Diacanthaspis

Murchisonia subulata

Subalveolites

Diadelognathus

Murchisonia xanthippe

Subalveolites angustus

Diadelognathus excertus

Murchisoniceras

Subalveolites callosus

Diagoniella

Musicrinus

Subalveolites crispus

Diagoniella mica

Musicrinus bodae

Subalveolites dubius

Diagoniella tubulara

Mutationella

Subalveolites eichwaldi

Diamesopora

Myalina

Subalveolites elegans

Diamphidiocystis

Myelodactylus

Subalveolites gracilis

Dianulites

Myelodactylus rotundatus

Subalveolites ordinarius

Diaphorocrinus

Myocaris plicata

Subalveolites panderi

Dibolbina

Myophoria

Subalveolites sokolovi

Dicaelosia oklahomenesis

Myoplusia

Subcaliapora

Dicamaropsis

Myoplusia contrastans

Subcaliapora magnifica

Dicellograptus

Myosocrinus

Subormoceras

Dicellograptus anceps

Myosocrinus chicottensis

Subretepora

Dicellograptus complanatus

Myriospirifer

Subriana

Dicellograptus ornatus

Myrmirhynx

Subtifloria

Dicellograptus sextans

Mysticocrinus

Subulites

Diceratograptus

Mytilarca

Subulites attenuatus

Diceromyonia

Mytilarca acutirostra

Subulites bohemicus

Dicoelosia

Mytilarca boucoti

Subulites compactus

Dicoelosia alticavata

Mytilarca mareki

Subulites ellisensis

Dicoelosia baltica

Mytilarca mytiliformis

Subulites lineolata

Dicoelosia biloba

Mytilarca parens

Subulites planilateralis

Dicoelosia cathaysiensis

Mytilus

Subulites richardsoni

Dicoelosia diversifrons