List of the Paleozoic life of Montana

{{Compact TOC}}

• †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

File:†Aenigmacaris cornigerum SCHRAM & HORNER 1979.jpg

• †Aesopichthys – type locality for genus
• †Aesopichthys erinaceus – type locality for species
• †Albertella – type locality for genus
• †Albertella hellena – type locality for species
• †Allanaria
• File:Allenypterus montanus fossil - Museum of the Rockies.jpg]] †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
• File:Aviculopecten subcardiformis01.JPG]] †Aviculopecten
• †Aviculopecten kaibabensis – or unidentified comparable form
• †Aviculopinna
• †Avonia
• †Avonia arcuata – tentative report
• †Axiodeaneia

{{Compact TOC}}

• †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
• File:Belantsea montana.JPG]] †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

{{Compact TOC}}

• †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
• File:Caridosuctor populosum.jpg]] †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
• File:Cladodont-tooth-cladodus-belifer.jpg]] †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
• File:Compositafossil.jpg]] †Composita
• †Composita humilis
• †Composita laevis
• †Composita lateralis – or unidentified comparable form
• †Composita madisonensis
• †Composita ovata
• †Composita ozarkana
• †Composita sulcata
• †Conularia
• File:Cornulites cellulosus.jpg]] †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
• File:Cyrtospirifer verneuili duo.jpg]] †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

{{Compact TOC}}

• †Damocles – type locality for genus
• †Damocles serratus – type locality for species
• †Deadwoodia
• †Debeerius – type locality for genus
• †Debeerius ellefseni – type locality for species
• †Dellea
• File:Delphyodontos dacriformes cropped.jpg]] †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
• File:Dikelocephalus minnesotensis pygidium draw.png]] †Dikelocephalus
• †Dimegelasma
• †Dinotocrinus
• †Discoserra – type locality for genus
• †Discoserra pectinodon – type locality for species

File:†Discoserra pectinodon Unt Karbon Bear Gulch Montana USA Ch2431.jpg

• †Distomodus
• †Dithyrocaris
• †Dithyrocaris rolfei – type locality for species

File:†Dithyrocaris rolfei Unt Karbon Bear Gulch Montana USA Ar2547.jpg

• †Ditodus
• †Drepanodus
• †Drepanodus subarcuatus
• †Drumaspis
• †Dysoristus

{{Compact TOC}}

• †Echinaria
• †Echinauris – or unidentified related form
• †Echinochimaera – type locality for genus
• †Echinochimaera meltoni – type locality for species

File:†Echinochimaera meltoni Lund 1977.jpg

• †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

{{Compact TOC}}

• †Faberophyllum
• File:Falcatus.jpg]] †Falcatus
• †Falcatus falcatus
• †Fasciculiamplexus
• †Fasciculophyllum
• †Favosites
• †Fenestella
• †Fenestralia – tentative report
• †Fenestrella
• †Finestrella – tentative report
• †Floweria
• †Floweria chemungensis – or unidentified comparable form
• †Furcaster

{{Compact TOC}}

• †Gattendorfia
• †Gattendorfia costata
• †Gennaeocrinus – or unidentified comparable form
• File:Geragnostus mediterraneus CRF cropped.jpg]] †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

{{Compact TOC}}

• †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
• File:Harpagofututor volsellorhinus.jpg]] †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

File:Heteropetalus elegantulus Bear Gulch Montana USA.jpg

• †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
• File:Hyoliths01.JPG]] †Hyolithes
• Hyperammina
• †Hypothyris
• †Hypseloconus
• †Hypseloconus elongatus
• †Hypseloconus simplex
• †Hystriculina
• †Hystriculina wabashensis – or unidentified comparable form
• †Hystricurus

{{Compact TOC}}

• †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

{{Compact TOC}}

• File:Janassa bituminosa.jpg (top and left)]] †Janassa
• †Janassa clarki – type locality for species
• †Joanellia
• †Joanellia lundi
• †Juresania

{{Compact TOC}}

• †Kainella
• †Kainella flagricauda
• †Kallimorphocrinus
• †Kalops
• †Kalops diophrys
• †Kalops monophrys
• †Katabuporhynchus
• †Katabuporhynchus mesacostalis
• †Kayseraspis
• File:Kendallina sp CRF.jpg]] †Kendallina
• †Kindbladia
• †Komiella
• †Komiella ostiolata
• †Koninkophyllum – tentative report
• †Kootenia
• †Kyphocephalus

{{Compact TOC}}

• †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
• File:Lingulella caelata 1.png]] †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

{{Compact TOC}}

• †Macluritella
• †Macluritella stantoni – or unidentified related form
• †Macronoda
• †Maladia
• †Marginifera
• †Marginovatia
• †Marginovatia duodenaria
• †Martinia
• †Maryvillia
• †Maryvillia omega – type locality for species
• †Mastigograptus
• †Megalaspidella
• File:Trilobites - Megistaspis aliena..JPG]] †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

{{Compact TOC}}

• †Nanorthis
• †Nanorthis putilla
• File:Neritopsidae - Naticopsis.JPG]] †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

{{Compact TOC}}

• †Obolus
• File:Ogyginus corndensis - National Museum of Nature and Science, Tokyo - DSC07744 cropped.jpg]] †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

{{Compact TOC}}

• †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

File:†Paratarrasius hibbardi Carboniferous Bear Gulch, Montana.jpg

• †Pegmatrea – or unidentified related form
• †Pelagiella
• †Peltabellia
• †Peltabellia willistoni – type locality for species
• †Pennireptepora
• File:Pentremites Glen Dean Fm KY.jpg]] †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
• File:Platyclymeniidae - Platyclymenia species.JPG]] †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
• File:Proetus concinnus reconstruction cropped.png]] †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
• File:Trilobites - Ptychoparia striata.JPG]] †Ptychoparia
• †Ptyocephalus
• †Ptyocephalus montanensis – type locality for species
• †Pugnoides
• †Pugnoides parvulus
• †Punctolira
• †Punctolira punctolira
• †Punctospirifer
• †Punctospirifer transversus
• †Pustula

{{Compact TOC}}

• †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

{{Compact TOC}}

• 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
• File:Spirifer perlamosus pedunculate valve.jpg]] †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
• File:Steth pair1 cropped.jpg]] †Stethacanthus
• †Stethacanthus altonensis
• †Stigmacephalus
• †Straparollus
• †Streblochondria
• †Stutchburia
• †Sulcocephalus
• †Sulcoretepora
• †Symphysurina
• †Syntrophina
• †Syntrophina nana
• †Syntrophopsis
• File:Syringoporid.jpg]] †Syringopora
• †Syringopora aculeata Grity
• †Syringopora suraularia – or unidentified related form
• †Syringospira
• †Syringospira prima
• †Syringothyris
• †Syringothyris hannibalensis
• †Syringothyris typus – or unidentified comparable form

{{Compact TOC}}

• †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

{{Compact TOC}}

• †Vesiculophyllum
• †Vogelgnathus
• †Vogelgnathus campbelli

{{Compact TOC}}

• †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

{{Compact TOC}}

• †Xenostegium

{{Compact TOC}}

• †Yochelsonellisa
• †Yochelsonellisa eximia

{{Compact TOC}}

• †Zaphrentites
• †Zaphriphyllum

• {{cite web |title=Fossilworks: Gateway to the Paleobiology Database |author=((Various Contributors to the Paleobiology Database)) |url=https://www.fossilworks.org |access-date=17 December 2021}}

{{Era nav|title=Lists of the prehistoric life of Montana|prefix=List of the |suffix= life of Montana}}

{{Lists of the Paleozoic life of the United States}}

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*Paleozoic

Montana