# List of the Paleozoic life of Montana

This list of the Paleozoic life of Montana contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Montana and are between 538.8 and 252.17 million years of age.

## A

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* B
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* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
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* R
* S
* T
* U
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* X
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* †Acanthocrania
** †Acanthocrania spinosa – type locality for species
* †Acanthograptus
* †Acanthopecten
** †Acanthopecten coloradoensis
* †Achistrum
** †Achistrum coloculum
** †Achistrum gamma
** †Achistrum monochordata
* †Acrothele
** †Acrothele colleni – type locality for species
** †Acrothele pentagonensis
* †Acrotreta
** †Acrotreta attica – or unidentified comparable form
* †Actinopteria
** †Actinopteria subdecussata – or unidentified comparable form
* †Adetognathus
** †Adetognathus gigantus
** †Adetognathus lautus
** †Adetognathus spathus
* †Aenigmacaris – type locality for genus
** †Aenigmacaris cornigerum – type locality for species
* †Aesopichthys – type locality for genus
** †Aesopichthys erinaceus – type locality for species
* †Albertella – type locality for genus
** †Albertella hellena – type locality for species
* †Allanaria
* Fossilized skeleton of the Carboniferous lobe-finned fish Allenypterus †Allenypterus – type locality for genus
** †Allenypterus montanus – type locality for species
* †Allorisma
* †Ambocoelia
** †Ambocoelia gregaria
* †Ambothyris
* †Ameura – tentative report
* Ammodiscus
* †Amphiscapha
* †Amplexizaphrentis
** †Amplexizaphrentis spinulosus – or unidentified comparable form
* †Amplexus
* †Angulotreta
* †Angyomphalus – tentative report
** †Angyomphalus excavatus – type locality for species
* †Anisotrypa
* †Ankhelasma
* †Annuliconcha
* †Anoria
* †Anthracospirifer
** †Anthracospirifer curvilateralis – type locality for species
** †Anthracospirifer occidus
** †Anthracospirifer shoshonensis
** †Anthracospirifer welleri
* †Antiquatonia
** †Antiquatonia coloradoensis
** †Antiquatonia pernodosa – type locality for species
* †Apatokephalus
** †Apatokephalus canadensis – or unidentified comparable form
* †Aphelaeceras
* †Aphelaspis
* †Apheoorthis
** †Apheoorthis ocha
* †Aporthophyla
* †Apotocardium
** †Apotocardium latifasciatum
* †Arceodomus
** †Arceodomus glabrata – type locality for species
* †Archisymplectes
** †Archisymplectes rhothon
* †Arctospirifer
** †Arctospirifer allegheniensis – or unidentified comparable form
* †Asaphellus
* †Astartella
* †Astreptoscolex
** †Astreptoscolex anasillosus
* †Athyris
* †Atrypa
* †Aulacoparia
** †Aulacoparia impressa – type locality for species
** †Aulacoparia wibauxensis
* †Aulopora
* Mold fossil of a shell of the Early Devonian-Late Triassic bivalve Aviculopecten †Aviculopecten
** †Aviculopecten kaibabensis – or unidentified comparable form
* †Aviculopinna
* †Avonia
** †Avonia arcuata – tentative report
* †Axiodeaneia

## B

* A
* B
* C
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* F
* G
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* I
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* M
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* †Babylonites
* †Bactrites
** †Bactrites nitidus
* Bairdia
* †Barytichisma
** †Barytichisma amsdenense
* †Basilicorhynchus
** †Basilicorhynchus ventricosum
* †Bathyuriscus
** †Bathyuriscus formosus – or unidentified comparable form
* †Beagiascus – type locality for genus
** †Beagiascus pulcherrimus – type locality for species
* †Beecheria
** †Beecheria paraplicata – type locality for species
* Restoration of the Carboniferous Chimaera relative Belantsea †Belantsea – type locality for genus
** †Belantsea montana – type locality for species
* †Bellefontia
* †Bellerophon
** †Bellerophon deflectus
* †Bifungites
** †Bifungites bisagitta
* †Billingsella
* †Blountia
* †Bolaspis
* †Brachythyris
* †Bradyphyllum
** †Bradyphyllum clavigerum – type locality for species
* †Bryantodus
** †Bryantodus crassidens
** †Bryantodus scitulus
* †Bryograptus
* †Bucanella
* †Bulimorpha
** †Bulimorpha elegans
* †Burnetiella
* †Buxtonia
** †Buxtonia arizonensis
* †Bynumiella – tentative report
* †Bynumina

## C

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* †Cactocrinus – tentative report
* †Caenanoplia – tentative report
** †Caenanoplia logani – or unidentified related form
* †Callograptus
* †Camaraspis
* †Camarophorella
** †Camarophorella buckleyi – or unidentified comparable form
* †Camarotoechia
** †Camarotoechia C. chouteauensis – or unidentified comparable form
** †Camarotoechia C. inaequa Shaw – or unidentified comparable form
** †Camarotoechia contracta
** †Camarotoechia crenistria
** †Camarotoechia elegantula
** †Camarotoechia herrickana – or unidentified related form
** †Camarotoechia metallica
** †Camarotoechia mettalica – or unidentified comparable form
** †Camarotoechia mutata
** †Camarotoechia tuta
* †Canadiphyllum
* †Caninia
** †Caninia montanensis – type locality for species
* †Carbosesostris – type locality for genus
** †Carbosesostris megaliphagon – type locality for species
* Fossilized skeleton of the Carboniferous coelacanth Caridosuctor †Caridosuctor – type locality for genus
** †Caridosuctor populosum – type locality for species
* †Carinoclymenia
* †Cavusgnathus
** †Cavusgnathus alta
** †Cavusgnathus naviculus
* †Ceratopea
** †Ceratopea sinclairensis
* †Ceratreta
* †Cheilocephalus
** †Cheilocephalus brevilobus
* †Cheiloceras
** †Cheiloceras simplex
* †Chilotrypa – tentative report
* †Chonetes
** †Chonetes geniculatus
** †Chonetes loganensis
** †Chonetes logani
** †Chonetes ornatus
* Fossilized tooth of the shark Cladodus †Cladodus
* †Clavallus
** †Clavallus spicaudina
* †Cleiothyridina
** †Cleiothyridina atrypoides
** †Cleiothyridina ciriacksi – type locality for species
** †Cleiothyridina coloradoensis – or unidentified comparable form
** †Cleiothyridina devonica
** †Cleiothyridina hirsuta
** †Cleiothyridina incrassata – or unidentified related form
** †Cleiothyridina sublamellosa
* †Cleiothyridnia
** †Cleiothyridnia sublamellosa
* †Cleistopora
** †Cleistopora placenta
* †Clelandia
* †Cliffia
* †Clionolithes
* †Clonograptus
* Fossilized shell of the Late Devonian-Permian brachiopod Composita †Composita
** †Composita humilis
** †Composita laevis
** †Composita lateralis – or unidentified comparable form
** †Composita madisonensis
** †Composita ovata
** †Composita ozarkana
** †Composita sulcata
* †Conularia
* Fossil of the Middle Ordovician-Carboniferous horn coral Cornulites †Cornulites
** †Cornulites carbonarius
* †Costatoblastus – type locality for genus
** †Costatoblastus sappingtonensis – type locality for species
* †Cranaena – tentative report
** †Cranaena circularis – type locality for species
* †Crania
** †Crania blairi – or unidentified comparable form
** †Crania rowleyi
* †Croixana
* †Crurithyris
** †Crurithyris minuta
** †Crurithyris parva – or unidentified comparable form
* †Cryptonella – tentative report
** †Cryptonella pinyonensis – or unidentified comparable form
* †Crytina
** †Crytina acutirostris
* †Culmicrinus
** †Culmicrinus jeffersonensis – or unidentified comparable form
* †Cupularostrum
** †Cupularostrum contracta
* †Cyathaxonia
* †Cypricardella
* †Cyranorhis – type locality for genus
** †Cyranorhis bergeraci – type locality for species
* †Cyrtina
** †Cyrtina acutirostris – or unidentified comparable form
* †Cyrtiopsis – tentative report
* †Cyrtodiscus
* †Cyrtorostra
** †Cyrtorostra varicostata
* Fossilized shells of the Middle-Late Devonian brachiopod Cyrtospirifer †Cyrtospirifer
** †Cyrtospirifer animaensis
** †Cyrtospirifer animasensis – or unidentified comparable form
** †Cyrtospirifer bertrandi – type locality for species
** †Cyrtospirifer gallatinensis
** †Cyrtospirifer hornellensis
** †Cyrtospirifer monticola
** †Cyrtospirifer perryi – type locality for species
** †Cyrtospirifer thalattodoxa – tentative report
** †Cyrtospirifer whitneyi
* †Cystodictya

## D

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* †Damocles – type locality for genus
** †Damocles serratus – type locality for species
* †Deadwoodia
* †Debeerius – type locality for genus
** †Debeerius ellefseni – type locality for species
* †Dellea
* Life restoration of the Carboniferous Chimaera relative Delphyodontos †Delphyodontos – type locality for genus
** †Delphyodontos dacriformes – type locality for species
* †Delthyris – tentative report
* †Dendrograptus
* †Dentinella
* †Derbyia
* †Deuteronectanebos – type locality for genus
** †Deuteronectanebos papillorum – type locality for species
* †Diaphelasma
* †Diaphragmus
** †Diaphragmus fasciculatus
* †Dicellomus
** †Dicellomus occidentalis
* †Dictyclostus
** †Dictyclostus richardsi
* †Dictyoclostus
** †Dictyoclostus ferglenensis – or unidentified comparable form
** †Dictyoclostus gallatinensis
** †Dictyoclostus inflatus
** †Dictyoclostus richardsi
* †Dictyoclosyus
** †Dictyoclosyus inflatus
* †Dictyonema
* †Dielasma
* Illustration of the fossilized pygidium (tail segment) of the Cambrian trilobite Dikelocephalus †Dikelocephalus
* †Dimegelasma
* †Dinotocrinus
* †Discoserra – type locality for genus
** †Discoserra pectinodon – type locality for species
* †Distomodus
* †Dithyrocaris
** †Dithyrocaris rolfei – type locality for species
* †Ditodus
* †Drepanodus
** †Drepanodus subarcuatus
* †Drumaspis
* †Dysoristus

## E

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* †Echinaria
* †Echinauris – or unidentified related form
* †Echinochimaera – type locality for genus
** †Echinochimaera meltoni – type locality for species
** †Echinochimaera snyderi – type locality for species
* †Echinocoelia
** †Echinocoelia youngstownensis
* †Echinoconchus
** †Echinoconchus alternatus – or unidentified related form
** †Echinoconchus angustus – type locality for species
* †Echinocrinus
* †Edmondia
** †Edmondia E. marionensis – or unidentified comparable form
** †Edmondia stuchburia
* †Ehmania – tentative report
* †Eleutherokomma
** †Eleutherokomma raymondi
* †Elrathiella – or unidentified comparable form
* †Elrathina
* †Elvinia
** †Elvinia roemeria
* †Emanuella
* †Enygmophyllum
* Eocaudina
** †Eocaudina columcanthus
** †Eocaudina marginata
** †Eocaudina subhexagona
* †Eolissochonetes
** †Eolissochonetes pseudoliratus – type locality for species
* †Eoorthis
** †Eoorthis remnicha
* †Euconia
** †Euconia umbilicata
* †Euloma
* †Eumetria
** †Eumetria acuticosta
** †Eumetria vera – or unidentified comparable form
** †Eumetria verneuilana – or unidentified comparable form
** †Eumetria verneuiliana – or unidentified comparable form
* †Euphemites
** †Euphemites crenulatus
** †Euphemites sacajawensis
* †Euphemitopsis
** †Euphemitopsis paucinodosus – or unidentified comparable form
** †Euphemitopsis subpapillosa
* †Exochops

## F

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* †Faberophyllum
* Life restorations of a female (top) and male (bottom) of the Carboniferous Chimaera relative Falcatus †Falcatus
** †Falcatus falcatus
* †Fasciculiamplexus
* †Fasciculophyllum
* †Favosites
* †Fenestella
* †Fenestralia – tentative report
* †Fenestrella
* †Finestrella – tentative report
* †Floweria
** †Floweria chemungensis – or unidentified comparable form
* †Furcaster

## G

* A
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* †Gattendorfia
** †Gattendorfia costata
* †Gennaeocrinus – or unidentified comparable form
* Fossil of the Early-Late Ordovician trilobite Geragnostus †Geragnostus
* †Girtyella
** †Girtyella indianensis
** †Girtyella woodsworthi – or unidentified comparable form
** †Girtyella woodworthi
* †Glabretina – type locality for genus
** †Glabretina andrewsi – type locality for species
* †Glabrocingulum – tentative report
* †Glaphyraspis
** †Glaphyraspis parva
* †Glossopleura
* †Glyphaspis
** †Glyphaspis robusta
* †Grammysia
** †Grammysia G. welleri – or unidentified comparable form
* †Graphiadactyllis
* †Guizhoupecten

## H

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* †Hadronector – type locality for genus
** †Hadronector donbairdi – type locality for species
* †Hallograptus
* †Hamburgia – tentative report
** †Hamburgia walteri – or unidentified comparable form
* †Hammatocyclus
* †Haplistion
* †Hapsiphyllum
* †Hardistiella – type locality for genus
** †Hardistiella montanensis – type locality for species
* Restoration (bottom) of the Carboniferous "antlered" Chimaera relative Harpagofututor †Harpagofututor – type locality for genus
** †Harpagofututor volsellorhinus – type locality for species
* †Helicoprion
* †Heteralosia
** †Heteralosia beecheri
* †Heteropecten
** †Heteropecten vanvleeti – or unidentified comparable form
* †Heteropetalus – type locality for genus
** †Heteropetalus elegantulus – type locality for species
* †Homalophyllites
* †Homotreta
** †Homotreta interrupta
* †Hormotoma
* †Horridonia – report made of unidentified related form or using admittedly obsolete nomenclature
* †Housia
** †Housia canadensis
* †Huenella
* †Hunanospirifer
** †Hunanospirifer animasensis
** †Hunanospirifer gallatinensis – tentative report
** †Hunanospirifer monticola
* †Hustedia
** †Hustedia texana
* Fossilized shells of the Cambrian-Permian brachiopod relative Hyolitha †Hyolithes
* Hyperammina
* †Hypothyris
* †Hypseloconus
** †Hypseloconus elongatus
** †Hypseloconus simplex
* †Hystriculina
** †Hystriculina wabashensis – or unidentified comparable form
* †Hystricurus

## I

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* †Icodonta
** †Icodonta nixonensis – or unidentified comparable form
** †Icodonta typica
* †Idahoia
* †Imbrexia
* †Imbricatia
* †Imitoceras
* †Inflatia
** †Inflatia inflata – or unidentified comparable form
* †Iphidella
** †Iphidella hexagona
** †Iphidella nyssa
* †Irvingella

## J

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* Restoration of the Carboniferous-Permian ray-like cartilaginous fish Janassa (top and left) †Janassa
** †Janassa clarki – type locality for species
* †Joanellia
** †Joanellia lundi
* †Juresania

## K

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* †Kainella
** †Kainella flagricauda
* †Kallimorphocrinus
* †Kalops
** †Kalops diophrys
** †Kalops monophrys
* †Katabuporhynchus
** †Katabuporhynchus mesacostalis
* †Kayseraspis
* Fossil of the Cambrian trilobite Kendallina †Kendallina
* †Kindbladia
* †Komiella
** †Komiella ostiolata
* †Koninkophyllum – tentative report
* †Kootenia
* †Kyphocephalus

## L

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* †Labiostria
* †Laminatia
** †Laminatia laminata – tentative report
* †Langepis
** †Langepis campbelli
* †Lecanospira
* †Leioestheria
* †Leioproductus
** †Leioproductus coloradensis
** †Leioproductus montanensis – type locality for species
** †Leioproductus plicatus
* †Leiorhynchus
** †Leiorhynchus carboniferus
** †Leiorhynchus dunbarense – or unidentified comparable form
** †Leiorhynchus gibbosa – or unidentified comparable form
** †Leiorhynchus jeffersonense
** †Leiorhynchus lesleyi
** †Leiorhynchus seversoni
** †Leiorhynchus ventricosa
** †Leiorhynchus ventricosta – or unidentified related form
* †Lepidasterella
** †Lepidasterella montanensis – type locality for species
* †Leptaena
* †Leptagonia
** †Leptagonia analoga
* †Leptalosia
** †Leptalosia scintilla – tentative report
* †Leptella
* †Leptodesma
* †Leptodus
* †Leptotrypella
* †Liardiphyllum
* †Licnocephala
* †Limipecten
** †Limipecten grandicostatus – or unidentified comparable form
** †Limipecten otterensis – type locality for species
* †Lineagruan – type locality for genus
** †Lineagruan judithi – type locality for species
** †Lineagruan snowyi – type locality for species
* †Lingula
** †Lingula carbonaria – or unidentified comparable form
* Illustration of a fossilized shell of the Cambrian-Late Ordovician brachiopod Lingulella †Lingulella
** †Lingulella ibicus
* †Lingulepis
* †Linnarssonella
** †Linnarssonella girtyi
* †Linnarssonia
** †Linnarssonia perplexa
** †Linnarssonia rotunda
* †Linoproductus
** †Linoproductus croneisi
** †Linoproductus duodenaris – type locality for species
** †Linoproductus nodosus
** †Linoproductus ovatus
* †Lioestheria
* †Lithostrotion
* †Lithostrotionella
** †Lithostrotionella microstylum Grity
* Lituotuba – tentative report
* †Lloydia
** †Lloydia incomperta
** †Lloydia manitouensis – or unidentified comparable form
* †Lochmocercus – type locality for genus
** †Lochmocercus aciculodontus – type locality for species
* †Lonchodina
** †Lonchodina projecta
* †Longiclava – type locality for genus
** †Longiclava tumida – type locality for species
* †Loxonema
** †Loxonema approximatum
* †Lyroschizodus
** †Lyroschizodus oklahomensis – or unidentified comparable form

## M

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* †Macluritella
** †Macluritella stantoni – or unidentified related form
* †Macronoda
* †Maladia
* †Marginifera
* †Marginovatia
** †Marginovatia duodenaria
* †Martinia
* †Maryvillia
** †Maryvillia omega – type locality for species
* †Mastigograptus
* †Megalaspidella
* Fossil of the Cambrian-Silurian trilobite Megistaspis †Megistaspis
* †Megistocrinus – or unidentified comparable form
* †Metriophyllum
* †Michelinia
* †Microantyx
** †Microantyx botoni
** †Microantyx mudgei
** †Microantyx permiana
* †Micromitra
** †Micromitra sculptilis
** †Micromitra subdita
* †Millerella
* †Monocheilus
* †Mooreoceras – tentative report
* †Multivasculatus
* †Myalina
** †Myalina meeki
** †Myalina parallela – type locality for species

## N

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* †Nanorthis
** †Nanorthis putilla
* Fossilized shell of the Early Devonian – Triassic sea snail Naticopsis †Naticopsis
** †Naticopsis remex – or unidentified comparable form
* †Nemavermes
** †Nemavermes mackeei
* †Neoprioniodus
* †Neospirifer
** †Neospirifer praenuntius – type locality for species
** †Neospirifer striatus
* †Neozaphrentis
** †Neozaphrentis parasitica
* †Netsepoye – type locality for genus
** †Netsepoye hawesi – type locality for species
* †Nickelsopora
* †Nisusia
** †Nisusia deissi
** †Nisusia lickensis
** †Nisusia montanaensis
* †Nix – type locality for genus
** †Nix angulata – type locality for species
* †Nucleospira
** †Nucleospira obesa
* Nuculana
** †Nuculana biangulata – type locality for species
* †Nuculopsis
** †Nuculopsis poposiensis

## O

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* Z
* †Obolus
* Fossil of the Ordovician trilobite Ogyginus †Ogyginus
* †Olenopsis
* †Orbiculoidea
** †Orbiculoidea interlineata – type locality for species
** †Orbiculoidea missouriensis – or unidentified comparable form
** †Orbiculoidea utahensis
* †Orbinaria
* †Orthonychia
* †Orthotetes
* †Orygmaspis
* †Ovatia
** †Ovatia croneisi
* †Oxinoxis
* †Ozarkodina
** †Ozarkodina deflecta
** †Ozarkodina elongata
** †Ozarkodina macilenta
** †Ozarkodina modesta
** †Ozarkodina regularis

## P

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Paladin – tentative report
* †Palaeoneilo
** †Palaeoneilo elongata
* †Palaeonucula
** †Palaeonucula montanensis
* †Paleolimulus
** †Paleolimulus longispinus
* †Papilionichthys – type locality for genus
** †Papilionichthys stahlae – type locality for species
* †Parabolinoides
* †Paracyclus
* †Paraparchites
* †Paraphorhynchus
** †Paraphorhynchus ashboughense – type locality for species
** †Paraphorhynchus jeffersonense
** †Paraphorhynchus madisonense
** †Paraphorhynchus threeforkensis – type locality for species
** †Paraphorhynchus threeforksense
* †Paratarrasius – type locality for genus
** †Paratarrasius hibbardi – type locality for species
* †Pegmatrea – or unidentified related form
* †Pelagiella
* †Peltabellia
** †Peltabellia willistoni – type locality for species
* †Pennireptepora
* Fossilized theca of the Carboniferous blastoid echinoderm ("sea bud") Pentremites †Pentremites
* †Perditocardinia
* †Pericyclus
** †Pericyclus rockymontanus – type locality for species
* †Permophorus
** †Permophorus albequus
* †Pernoceras
** †Pernoceras crebriseptum
* †Peronopsis
** †Peronopsis scutalis – or unidentified comparable form
* †Petalorhynchus
** †Petalorhynchus beargulchensis – type locality for species
* †Petrocrania
** †Petrocrania modesta – or unidentified comparable form
* †Phestia
** †Phestia rugodorsata – type locality for species
* †Phiops – type locality for genus
** †Phiops aciculorum – type locality for species
* †Pinctus
* †Pinna
** †Pinna ludlovi
* †Plagioglypta
* †Platyceras
** †Platyceras niagarensis – or unidentified comparable form
* Fossilized shell of the Late Devonian ammonoid cephalopod Platyclymenia †Platyclymenia
** †Platyclymenia montana
* †Platycrinus
** †Platycrinus bozemanensis
** †Platycrinus incomptus
* †Plectodiscus
** †Plectodiscus latinautilus
* †Plectospira – tentative report
** †Plectospira problematica – or unidentified comparable form
* †Plethopeltis
* †Plethospira
* †Pleuroclymenia
** †Pleuroclymenia americana
* †Polidevcia
** †Polidevcia obesa
* †Polyosteorhynchus – type locality for genus
** †Polyosteorhynchus simplex – type locality for species
* †Polypora
* †Polyrhizodus
** †Polyrhizodus digitatus
* †Praepatokephalus
* †Presbynileus
* †Proceramala – type locality for genus
** †Proceramala montanensis – type locality for species
* †Procostatoria
** †Procostatoria sexradiata
* †Prodentalium
** †Prodentalium canna
* †Productella
** †Productella coloradensis
** †Productella coloradoense – or unidentified comparable form
** †Productella coloradoensis
** †Productella plicata – or unidentified comparable form
** †Productella spinerga – or unidentified comparable form
* †Productus
* Restoration of the Silurian trilobite Proetus †Proetus
* †Prographularia
** †Prographularia groenlandica – or unidentified comparable form
* †Promesus
* †Proplina
** †Proplina loganensis – type locality for species
* †Protopliomerops
* †Prototreta
** †Prototreta flabellata
** †Prototreta subcircularis
** †Prototreta trapeza
* †Psalikilus
** †Psalikilus paraspinosum
* †Psammodus
* †Pseudagnostus
* †Pseudoclelandia
* †Pseudodicellomus
* †Pseudogastrioceras
* †Pseudomonotis
* †Pseudopermophorus
** †Pseudopermophorus annettae – type locality for species
* †Pseudozygopleura
** †Pseudozygopleura scitula – or unidentified related form
* †Pterocephalia
* †Ptilograptus
* †Ptychagnostus
** †Ptychagnostus atavus
* †Ptychaspis
* †Ptychomalotoechia
** †Ptychomalotoechia sobrina
* Fossils of the Cambrian trilobite Ptychoparia †Ptychoparia
* †Ptyocephalus
** †Ptyocephalus montanensis – type locality for species
* †Pugnoides
** †Pugnoides parvulus
* †Punctolira
** †Punctolira punctolira
* †Punctospirifer
** †Punctospirifer transversus
* †Pustula

## R

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Rachistognathus
* †Rainerichthys – type locality for genus
** †Rainerichthys zangerli – type locality for species
* †Ramesses – type locality for genus
** †Ramesses magnus – type locality for species
* †Ramiporalia
* †Raphistomina
* †Renalcis
* †Reticularia
* †Reticulariina
** †Reticulariina browni
** †Reticulariina spinosa
* †Reticularina
** †Reticularina spinosa
* †Retispira
* †Reubenella – type locality for genus
** †Reubenella rex – type locality for species
* †Rhabdomeson
* †Rhineoderma
* †Rhipidomella
** †Rhipidomella missouriensis
** †Rhipidomella newalbanensis – or unidentified comparable form
* †Rhombopora
* †Rhynchopora
* †Rhynchotreta – tentative report
* †Rhytiophora
** †Rhytiophora arcuatus
* †Rhytiopora
** †Rhytiopora arcuatus – tentative report
* †Rota
** †Rota martini
* †Rotiphyllum
* †Rugoclostus
* †Rylstonia
* †Rystonia
** †Rystonia R. teres (Grity) – or unidentified comparable form

## S

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* Saccammina
* †Sanguinolites
** †Sanguinolites altidorsata – type locality for species
* †Saratogia
* †Saukia
* †Scalarituba
** †Scalarituba missouriensis
* †Scapallina
** †Scapallina phosphoriensis
* †Scaphellina
** †Scaphellina concinna
* †Scaphiomanon – type locality for genus
** †Scaphiomanon hadros – type locality for species
** †Scaphiomanon nodulosum – type locality for species
* †Schallwienella
* †Schellwienella
** †Schellwienella inflata
* †Schizambon
* †Schizodus
** †Schizodus bifidus – type locality for species
* †Schizopea
* †Schizophoria
** †Schizophoria australis
** †Schizophoria compacta
** †Schizophoria depressa – type locality for species
** †Schizophoria striatula
** †Schizophoria strophodonta
* †Schuchertalla
* †Schuchertella
** †Schuchertella arctostriata
** †Schuchertella extensus – or unidentified comparable form
** †Schuchertella inflata
** †Schuchertella lens
** †Schuchertella nodocostata
* †Scolopodus
** †Scolopodus quadraplicatus
* †Sentosia
** †Sentosia spinigera – or unidentified comparable form
* †Septimyalina
* †Shizophoria
** †Shizophoria chouteauensis
** †Shizophoria swalleri
* †Shumardella
** †Shumardella dunbarensis
* †Siksika – type locality for genus
** †Siksika ottae – type locality for species
* †Sinuella
* †Soleniscus
* †Solenopleurella
* †Soris – type locality for genus
** †Soris labiosus – type locality for species
* †Spathognathodus
** †Spathognathodus peculiaris
* †Sphenosteges
* †Sphenotus
** †Sphenotus altidorsatus – or unidentified comparable form
* Fossilized shell of the Late Ordovician-Late Triassic brachiopod Spirifer †Spirifer
** †Spirifer brazerianus – or unidentified related form
** †Spirifer centronatus
** †Spirifer greenockensis – or unidentified comparable form
** †Spirifer grimesi
** †Spirifer louisianensis – or unidentified related form
** †Spirifer marionensis – or unidentified comparable form
** †Spirifer mudulus
** †Spirifer raymondi
** †Spirifer S. centronatus Winchell – or unidentified comparable form
** †Spirifer S. grimesi Hall – or unidentified comparable form
** †Spirifer shoshonensis
** †Spirifer welleri – tentative report
* †Spiriferina
** †Spiriferina solidirostris – or unidentified comparable form
* Spirorbis
** †Spirorbis kinderhookensis
** †Spirorbis moreyi – or unidentified related form
* †Spraparallus
* †Squamaria
* †Squatinactis – type locality for genus
** †Squatinactis caudispinatus – type locality for species
* †Squillites – type locality for genus
** †Squillites spinosus – type locality for species
* †Stenoglaphyrites
** †Stenoglaphyrites hesperius
* †Stenoscisma
** †Stenoscisma obesa
* Life restorations of a male (foreground) and female (background) of the Late Devonian-Carboniferous Chimaera relative Stethacanthus †Stethacanthus
** †Stethacanthus altonensis
* †Stigmacephalus
* †Straparollus
* †Streblochondria
* †Stutchburia
* †Sulcocephalus
* †Sulcoretepora
* †Symphysurina
* †Syntrophina
** †Syntrophina nana
* †Syntrophopsis
* Fossil of the Devonian tabulate coral Syringopora †Syringopora
** †Syringopora aculeata Grity
** †Syringopora suraularia – or unidentified related form
* †Syringospira
** †Syringospira prima
* †Syringothyris
** †Syringothyris hannibalensis
** †Syringothyris typus – or unidentified comparable form

## T

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Taenicephalus
* †Teiichispira
** †Teiichispira affinis
* †Tetralobula
* †Thalattocanthus
** †Thalattocanthus consonus
* †Thamnopora
* Thurammina
* †Thuroholia
** †Thuroholia cribriformis
** †Thuroholia spicatus
* †Thysanophyllum
* †Timaniella
** †Timaniella pseudocamerata
* †Tolypammina
* †Tomagnostus
* †Tomasina – tentative report
* †Tonkinella
** †Tonkinella stephenensis – or unidentified comparable form
* †Tornoceras
** †Tornoceras crebiseptum
* †Torynifer
** †Torynifer cooperensis
** †Torynifer setiger – or unidentified comparable form
* †Torynifera
** †Torynifera montanus
* †Trachelocrinus – tentative report
* †Triplophylliltes
** †Triplophylliltes spinulosus – or unidentified comparable form
* †Trochophyllum
* †Tropidodiscus
* Tubulipora
** †Tubulipora amsdenense – tentative report
* †Tylonautilus
* †Tylothyris
** †Tylothyris clarkesvillensis
** †Tylothyris clarksvillensis
** †Tylothyris compacta
** †Tylothyris novamexicana – or unidentified comparable form

## V

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Vesiculophyllum
* †Vogelgnathus
** †Vogelgnathus campbelli

## W

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Warthia
* †Waylandella
* †Wellerella
** †Wellerella osagensis – or unidentified comparable form
* †Wendyichthys – type locality for genus
** †Wendyichthys dicksoni – type locality for species
** †Wendyichthys lautreci – type locality for species
* †Westergaardodina
* †Whidbornella
** †Whidbornella hirsuta
** †Whidbornella lachrymosa
* †Wilbernia
* †Wilkingia
** †Wilkingia inflata – type locality for species
** †Wilkingia walkeri
* †Wimanella – type locality for genus
** †Wimanella simplex – type locality for species
* †Worthenia – tentative report

## X

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Xenostegium

## Y

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Yochelsonellisa
** †Yochelsonellisa eximia

## Z

* A
* B
* C
* D
* E
* F
* G
* H
* I
* J
* K
* L
* M
* N
* O
* P
* Q
* R
* S
* T
* U
* V
* W
* X
* Y
* Z
* †Zaphrentites
* †Zaphriphyllum