# List of the Paleozoic life of Michigan

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

## A

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* †Acanthoclema
** †Acanthoclema ohioensis
* †Acanthonema – type locality for genus
** †Acanthonema holopiforme – type locality for species
** †Acanthonema laxa – type locality for species
* †Acidaspis
* †Actinoceras
** †Actinoceras backi
** †Actinoceras bigsbyi – or unidentified comparable form
** †Actinoceras gouldense – type locality for species
** †Actinoceras sphaeroidale
* †Alaskozygopleura
** †Alaskozygopleura gracillium
* Fossilized fronds of the Carboniferous-Early Cretaceous seed fern Alethopteris †Alethopteris
** †Alethopteris decurrens
** †Alethopteris Helenae
* †Allonema
* †Ambocoelia – report made of unidentified related form or using admittedly obsolete nomenclature
** †Ambocoelia umbonata – report made of unidentified related form or using admittedly obsolete nomenclature
* †Ambonychia
** †Ambonychia carinata
** †Ambonychia elroyi
** †Ambonychia obesa
* †Amphilichas
** †Amphilichas cucullus – tentative report
* †Anazyga
** †Anazyga recurvirostra
* Fossil of the Carboniferous horsetail relative Annularia †Annularia
** †Annularia asteris
** †Annularia sphenophylloides
* †Anomalodonta
** †Anomalodonta gigantea – or unidentified comparable form
* †Anoptera
** †Anoptera angusta
* †Anthropora
** †Anthropora shafferi
* †Antirotella
** †Antirotella helicinaeformis – type locality for species
* †Archinacella
** †Archinacella kagawongensis
* †Arcyzona
** †Arcyzona apobathrota
* †Arthroacantha
** †Arthroacantha carpenteri
* †Ascodictyon
** †Ascodictyon fusiforme
* †Asolanus
** †Asolanus camptotaena
* †Asterophyllites
** †Asterophyllites equisetiformis
** †Asterophyllites longifolius – or unidentified comparable form
** †Asterophyllites vernensis
* †Atactoechus
** †Atactoechus typicus – or unidentified comparable form
* †Athyris
** †Athyris lens
** †Athyris vittata
* Fossilized shell of the Late Ordovician-Carboniferous brachiopod Atrypa †Atrypa
** †Atrypa traversensis
* †Aulacera
** †Aulacera nodulifera
* †Aulacotheca
** †Aulacotheca Campbelli
* †Aulocystis
** †Aulocystis auloporoidea
** †Aulocystis jacksoni
** †Aulocystis lucasensis
* †Aulopora
** †Aulopora microbuccinata

## B

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* †Batostoma
* †Beatricea
** †Beatricea undulata
* Fossilized shell of the Silurian-Early Triassic mollusc Bellerophon †Bellerophon
** †Bellerophon barquensis – type locality for species
** †Bellerophon newberryi
** †Bellerophon pelops
* †Bensbergia
** †Bensbergia subcostata
* †Bethanyphyllum
** †Bethanyphyllum robustum
* †Bicarina
** †Bicarina petilitornata
* †Bigalea – type locality for genus
** †Bigalea yangi – type locality for species
* †Billingsites
** †Billingsites newberryi
* †Bothrodendron
** †Bothrodendron minutifolium
** †Bothrodendron punctatum
* †Botryllopora
** †Botryllopora socialis
* †Bowmanites
* †Brachyprion
* †Buechelia
** †Buechelia tyrrelli
* †Byssonychia
** †Byssonychia richmondensis
* Bythocypris
** †Bythocypris cylindrica
* †Bythopora
** †Bythopora striata

## C

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* Fossilized stems from the Carboniferous-Permian horsetail relative Calamites †Calamites
** †Calamites carinatus
** †Calamites cistii
** †Calamites ramosus
** †Calamites schutzeiformis
** †Calamites suckowii
** †Calamites undulatus
* †Calapoecia
** †Calapoecia cribriformis
** †Calapoecia huronensis
* †Callipleura
** †Callipleura nobilis – or unidentified comparable form
* †Callixylon
** †Callixylon newberryi
* Fossil of the Early Ordovician-Early Devonian trilobite Calymene †Calymene
* †Camarotoechia
* †Cardiocaron
** †Cardiocaron reniformis
* †Cardiocarpon
** †Cardiocarpon annulatum
** †Cardiocarpon bicuspidatum
** †Cardiocarpon cuyahogae
** †Cardiocarpon late-alatum
** †Cardiocarpon ovale
* Fossil of the Middle-Late Ordovician trilobite Ceraurus †Ceraurus
** †Ceraurus simmonsi
* †Cerithioides
** †Cerithioides incomptum
* †Cheirocrinus – tentative report
* †Chonetes
** †Chonetes ensicosta
** †Chonetes hybus
** †Chonetes pachyactis
* †Clathronema
** †Clathronema cingulata
* †Clidophorus
** †Clidophorus noquettensis
** †Clidophorus ogontzensis
* Assemblage of fossils of the Cambrian graptolite Climacograptus †Climacograptus
** †Climacograptus putillus
* †Coelospira
* †Coleolus
* †Colpomya
** †Colpomya colgateri
* †Columnaria
** †Columnaria alveolata
** †Columnaria calicina
** †Columnaria stokesi
* †Conularia
** †Conularia formosa
** †Conularia trentonensis
* †Cordaianthus
** †Cordaianthus ampullaceus
** †Cordaianthus devonicus
* Fossilized foliage of the Carboniferous-Permian conifer relative Cordaites †Cordaites
** †Cordaites borassifolius
** †Cordaites crassinervis
** †Cordaites michiganensis
** †Cordaites palmaeformis
** †Cordaites principalis
** †Cordaites Robbii – tentative report
* †Cornulites
** †Cornulites corrugatus
** †Cornulites flexuosus
** †Cornulites sterlingensis – or unidentified comparable form
* †Corocrinus
** †Corocrinus pettyesi
* †Corynepteris
** †Corynepteris coralloides – tentative report
* †Cranaena
** †Cranaena amygdaloidea – or unidentified related form
** †Cranaena lincklaeni
** †Cranaena romingeri
* †Crenulazona
** †Crenulazona angulata
* †Cryptonella
* †Ctenodonta
** †Ctenodonta iphigenia
* †Cuneamya
** †Cuneamya miamiensis
* †Cupularostrum
** †Cupularostrum prolificum
* †Cyclonema
** †Cyclonema minuta
* †Cylindrophyllum
** †Cylindrophyllum profundum
* †Cymatonota
** †Cymatonota typicalis – or unidentified comparable form
* †Cyrtina
** †Cyrtina alpenensis
** †Cyrtina hamiltonensis – report made of unidentified related form or using admittedly obsolete nomenclature
** †Cyrtina umbonata
* †Cyrtoceras – tentative report
* †Cyrtodonta
** †Cyrtodonta grandis
** †Cyrtodonta potteri
* †Cyrtolites
** †Cyrtolites ornatus
* †Cyrtostropha
** †Cyrtostropha salteri

## D

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* †Dalmanella
** †Dalmanella emacerata
** †Dalmanella jugosa
* †Decorochilina
** †Decorochilina robusta
* †Denayella
** †Denayella bella – type locality for species
* †Devonalosia
** †Devonalosia wrightorum
* †Devonochonetes
** †Devonochonetes coronatus
** †Devonochonetes fragilis
** †Devonochonetes scitulus
* †Dictyobembix – type locality for genus
** †Dictyobembix bella – type locality for species
* †Diplothmema
* †Discinites
** †Discinites delectus
** †Discinites jongmansi
* †Discosorus
** †Discosorus ehlersi – type locality for species
** †Discosorus halli – type locality for species
** †Discosorus parksi – type locality for species
** †Discosorus remotus – tentative report
* †Douvillina
** †Douvillina distans
* †Duncanella – tentative report

## E

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* †Echinocaris
** †Echinocaris punctata
* †Echinocoelia
* †Elasmonema – tentative report
** †Elasmonema corrugata
* †Eldredgeops
** †Eldredgeops rana
* †Eliasopora
** †Eliasopora stellatum
* †Elita
** †Elita filicosta
* †Encrinurus
* †Endoceras
* †Eremopteris
** †Eremopteris michiganensis
* Fossils (figures 2–10) of the Silurian-Devonian eurypterid ("sea scorpion") Erieopterus †Erieopterus
** †Erieopterus microphthalmus
* †Euphemites – tentative report
** †Euphemites devoniana
* †Euryzone
** †Euryzone latitornata – type locality for species
** †Euryzone pharkidopyndax – type locality for species
* †Euthyrhachis
** †Euthyrhachis indianense

## F

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* Fossil of the Late Ordovician-Permian tabulate coral Favosites †Favosites
* †Ferganella
* †Flexicalymene
** †Flexicalymene croneisi
** †Flexicalymene magnipapilla – type locality for species
** †Flexicalymene meeki – or unidentified comparable form
** †Flexicalymene planilabra – type locality for species
** †Flexicalymene praelongicephala – type locality for species
** †Flexicalymene quadricapita – type locality for species
** †Flexicalymene senaria
* †Floweria
** †Floweria lirella

## G

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* †Geniculograptus
** †Geniculograptus pygmaeus
* †Gennaeocrinus
** †Gennaeocrinus chilmanae
** †Gennaeocrinus romingeri
* †Genuspira – type locality for genus
** †Genuspira nodosa – type locality for species
* †Gigantopteris
** †Gigantopteris dawsoni
** †Gigantopteris kellyi
* Fossilized calyx and partial stem of the Devonian-Carboniferous crinoid ("sea lily") Gilbertsocrinus †Gilbertsocrinus
** †Gilbertsocrinus ohioensis
* †Ginkgophyllum
** †Ginkgophyllum grandifolium
* †Girvanella
** †Girvanella richmondensis
* †Glossograptus
* †Grammysia
* †Graptodictya
** †Graptodictya proava
* Multiple views of a fossil of the Ordovician horn coral Grewingkia †Grewingkia
** †Grewingkia canadensis
** †Grewingkia deltensis
* †Gypidula
** †Gypidula petoskeyensis

## H

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* Fossil of the Ordovician bryozoan ("moss animal") Hallopora †Hallopora
** †Hallopora subnodosa
* †Halysites
** †Halysites gracilis
* †Hebertella
** †Hebertella alveata
** †Hebertella occidentalis
* †Hederella
** †Hederella alpenensis
** †Hederella bilineata
** †Hederella cirrhosa
** †Hederella concinnoides
** †Hederella delicatula
** †Hederella filiformis
** †Hederella magna
** †Hederella parvirugosa
** †Hederella rectifurcata
** †Hederella reimanni
** †Hederella stolonifera
** †Hederella thedfordensis
** †Hederella vagans
* †Helicelasma
** †Helicelasma rusticum
* †Helicotoma
** †Helicotoma brocki
* †Helopora
** †Helopora inexpectata
* †Hercostrophia
** †Hercostrophia robusta
* †Hesperorthis
** †Hesperorthis tricenaria
* †Heterophrentis
** †Heterophrentis simplex
* †Heterotrypa
* Fossil of the Devonian colonial rugose coral Hexagonaria, also known as a Petoskey stone †Hexagonaria
** †Hexagonaria pericarinata
* †Hindia
** †Hindia subrotunda
* †Hippocardia
** †Hippocardia monroica
* †Hippurograptus
* †Hiscobeccus
** †Hiscobeccus capax
* Fossilized shells of the Ordovician-Carboniferous sea snail Holopea †Holopea
** †Holopea hubbardi – or unidentified related form
* †Holtedahlina
** †Holtedahlina sulcata
* †Hormotoma
** †Hormotoma gracilis
* †Hormotomina
** †Hormotomina penduliobesa
* †Howellella
* †Huronia
** †Huronia annulata
** †Huronia bigsbyi
*** †Huronia bigsbyi intermedia – type locality for variety
** †Huronia distincta
** †Huronia engadinensis – type locality for species
** †Huronia minuens
** †Huronia obliqua
** †Huronia paulodilatata
** †Huronia romingeri
** †Huronia turbinata
** †Huronia minuens
** †Huronia vertebralis
* †Huroniella
** †Huroniella ehlersi – type locality for species
* †Hyperoblastus
** †Hyperoblastus reimanni
* †Hypomphalocirrus
** †Hypomphalocirrus rugosus

## I

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* †Icriodus
** †Icriodus latericrescens
* †Illionia
* †Inocaulis
* †Intrapora
* †Isochilina
* Fossil of the Middle-Late Ordovician giant trilobite Isotelus. †Isotelus
** †Isotelus gigas

## K

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* †Kitikamispira
** †Kitikamispira speciosum

## L

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* †Leioclema
** †Leioclema alpenense
* †Leiorhynchus
** †Leiorhynchus kelloggi
** †Leiorhynchus lucasi
* †Leperditia
* †Lepidocarpon
** †Lepidocarpon linear
* Restoration of the Carboniferous-Late Triassic club moss relative Lepidodendron. Eli Heimans (1911). †Lepidodendron
** †Lepidodendron aculeatum
** †Lepidodendron Brittsii
** †Lepidodendron dichotomum
** †Lepidodendron lanceolatum
** †Lepidodendron lycopodiodes
** †Lepidodendron obovatum
** †Lepidodendron obvatum
** †Lepidodendron ophiurioides
** †Lepidodendron vestitum
* †Lepidostrobus
** †Lepidostrobus bartlettii
* †Leptaena
* †Leptalosia
** †Leptalosia radicans
* †Leptobolus
** †Leptobolus insignis
* †Leptolosia
** †Leptolosia radicans
* †Leptotrypella
** †Leptotrypella ohioensis
* †Lichenocrinus
** †Lichenocrinus tuberculatus
* †Lingula
** †Lingula changi
** †Lingula cobourgensis
** †Lingula ogontzensis
** †Lingula progne – or unidentified comparable form
** †Lingula whitfieldi – or unidentified comparable form
* †Liospira
** †Liospira micula
* †Longispina
** †Longispina lissohybus
* †Lophospira
** †Lophospira milleri
** †Lophospira perangulata – or unidentified related form
* †Lyopora
** †Lyopora goldfussi

## M

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* †Maelonoceras
** †Maelonoceras ligarius
* †Manitobiella
** †Manitobiella goniostoma
* †Mariopteris
** †Mariopteris muricata
** †Mariopteris nervosa
* †Mastigograptus
* †Mastigospira
** †Mastigospira ingens – type locality for species
** †Mastigospira intermedia – type locality for species
* †Mediospirifer
** †Mediospirifer audaculus
* †Megastrophia
** †Megastrophia concava
* Illustration (lower right, entry 15) of a fossilized shell in front and side views of the Silurian-Late Devonian brachiopod Meristella †Meristella
* †Mesocoelia
** †Mesocoelia obstipisutura
** †Mesocoelia priscum
* †Mesotrypa
* †Modiolopsis
** †Modiolopsis noquettensis
** †Modiolopsis valida
* †Monticulipora
** †Monticulipora epidermata
* Fossilized shell of the Devonian brachiopod Mucrospirifer †Mucrospirifer
** †Mucrospirifer attenuatus
** †Mucrospirifer grabaui
** †Mucrospirifer latus
** †Mucrospirifer mucronatus
** †Mucrospirifer profundus
** †Mucrospirifer prolificus
** †Mucrospirifer thedfordensis
* †Murchisonia
** †Murchisonia akidota
** †Murchisonia anderdoniae
** †Murchisonia deludisubzona – type locality for species
** †Murchisonia dowlingii
** †Murchisonia gracilicrista
** †Murchisonia sibleyensis
** †Murchisonia subcarinata
** †Murchisonia subulata – type locality for species

## N

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* †Naticopsis
** †Naticopsis manitobensis
* Fronds of the Carboniferous seed fern Neuropteris †Neuropteris
** †Neuropteris caudata
** †Neuropteris dilitata
** †Neuropteris flexuosa
** †Neuropteris gigntea – tentative report
** †Neuropteris harrisi – or unidentified comparable form
** †Neuropteris heterophylla – or unidentified comparable form
** †Neuropteris obliqua
** †Neuropteris rarinervis
** †Neuropteris saginawensis
** †Neuropteris scheuchzeri
** †Neuropteris Schlehani
** †Neuropteris tenuifolia
* †Nodonema
** †Nodonema granulatum
* †Nowakia
* †Nuculites
** †Nuculites neglectus
* †Nuculoidea
** †Nuculoidea lirata – or unidentified comparable form

## O

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* †Odontopteris
* †Oenonites
** †Oenonites curvidens – or unidentified related form
* Fossil of the Ordovician trilobite Ogygites †Ogygites
** †Ogygites latimarginatus
* †Oligorachs
** †Oligorachs littletonensis
* †Omphalocirrus
* †Onchometopus
* †Oncoceras
* †Ophisthoptera
** †Ophisthoptera casei – or unidentified comparable form
* †Ophistoloba
** †Ophistoloba gouldi
* †Opisthoptera
** †Opisthoptera gouldi
** †Opisthoptera griffini
* †Opisthopteri
** †Opisthopteri casei – or unidentified comparable form
* †Orbiculoidea
* †Ormoceras
** †Ormoceras bayfieldi
** †Ormoceras whitei
* †Orthoceras
** †Orthoceras alienum – or unidentified comparable form
* †Orthodesma
** †Orthodesma subangulatum – or unidentified comparable form
* †Orthograptus
** †Orthograptus eucharis
** †Orthograptus quadrimucronatus
** †Orthograptus truncatus
* †Orthonota
** †Orthonota parvula
** †Orthonota undulata
* †Orthonychia
** †Orthonychia variablis – type locality for species
* †Orthopleura
** †Orthopleura B Imbrie – informal
* †Oxoplecia – or unidentified comparable form
** †Oxoplecia calhouni

## P

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* †Pachydictya
* †Pagodea
** †Pagodea falcatinoda – type locality for species
* †Palaeopteridium
** †Palaeopteridium Reussi
* †Palaeoscurria – tentative report
* †Palaeozygopleura
** †Palaeozygopleura hamiltoniae
** †Palaeozygopleura joani
** †Palaeozygopleura sibleyensis
* †Paleofavosites
** †Paleofavosites asper
* †Palmatopteris
** †Palmatopteris furcata
* †Panenka
** †Panenka canadensis
* †Papillicalymene
** †Papillicalymene husseyi – type locality for species
* Assemblage of the Early-Middle Devonian brachiopod Paraspirifer †Paraspirifer
** †Paraspirifer bownockeri
* †Paupospira
** †Paupospira bowdeni
** †Paupospira tropidophora
* †Pecopteris
** †Pecopteris dentata – tentative report
** †Pecopteris miltoni
* †Penniretepora
** †Penniretepora irregularis – or unidentified comparable form
* †Pentamerella
** †Pentamerella athyroides
** †Pentamerella aulax
** †Pentamerella papilla
** †Pentamerella pericosta
** †Pentamerella petoskeyensis
** †Pentamerella proteus
** †Pentamerella E – informal
* †Pentameroides
* Fossilized shell of the Silurian-Middle Devonian brachiopod Pentamerus †Pentamerus
* †Peronopora
** †Peronopora decipiens
* †Petrochus
** †Petrochus conica – type locality for species
** †Petrochus mellaria – type locality for species
* †Petrocrania
** †Petrocrania scabiosa
* †Pholadomorpha
** †Pholadomorpha pholadiformis
* †Pholidops
** †Pholidops subtruncata
* †Pholidostrophia
** †Pholidostrophia geniculata
** †Pholidostrophia gracilis
** †Pholidostrophia nacrea
** †Pholidostrophia ovata
* †Phragmolites
** †Phragmolites slawsoni
* †Physostoma
** †Physostoma winchellii
** †Physostoma Winchellii
* †Plaesiomys
** †Plaesiomys subquadrata
* †Planalveolitella
** †Planalveolitella parasitica
* Fossilized shell of the Silurian-Early Triassic sea snail Platyceras †Platyceras
** †Platyceras bucculentum
** †Platyceras carinatum
** †Platyceras rarispinum
* †Platystrophia
** †Platystrophia acutilirata
** †Platystrophia annieana
** †Platystrophia clarkesvillensis
** †Platystrophia clarksvillensis
** †Platystrophia cypha – or unidentified related form
** †Platystrophia moritura
* †Plectambonites
** †Plectambonites rugosus
** †Plectambonites sericeus
* †Plectonotus
** †Plectonotus raricostatus
* Fossil of the Silurian-Carboniferous tabulate coral Pleurodictyum †Pleurodictyum
** †Pleurodictyum cornu
* †Polygnathus
** †Polygnathus varcus
* †Primitia
** †Primitia cincinnatiensis
* †Primitiella
** †Primitiella stoningtonensis
** †Primitiella unicornis
* Proboscina
** †Proboscina auloporoides
* †Productella
* Restoration of the Silurian trilobite Proetus †Proetus
** †Proetus chambliensis
* †Prosserella
** †Prosserella subtransversa
* †Protaraea
** †Protaraea richmondensis
* †Protarea
** †Protarea richmondensis
* †Protokionoceras
* †Protoleptostrophia
** †Protoleptostrophia lirella
** †Protoleptostrophia perplana
* †Pseudoatrypa
** †Pseudoatrypa devoniana – or unidentified comparable form
* †Pseudomphalotrochus
** †Pseudomphalotrochus cottrelli – type locality for species
** †Pseudomphalotrochus gibsoni – type locality for species
* †Pseudopecopteris
** †Pseudopecopteris avoldensis – or unidentified comparable form
* †Psiloconcha
** †Psiloconcha subovalis
* †Pterinea
** †Pterinea demissa
** †Pterinea insueta – or unidentified related form
** †Pterinea insuetta – or unidentified related form
* †Ptychomphalina
** †Ptychomphalina lucina – tentative report
* †Ptychopteria
** †Ptychopteria fasciulatus
** †Ptychopteria michiganesis
** †Ptychopteria swanni
* †Pugnoides

## 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
* †Rafinesquina
** †Rafinesquina alternata
** †Rafinesquina breviusculus
** †Rafinesquina pregibbosa
* †Rafinesquna
** †Rafinesquna pregibbosa
* †Rectograptus
** †Rectograptus amplexicaulis
** †Rectograptus peosta
* †Retispira
** †Retispira sullivani
* †Rhabdocarpus
** †Rhabdocarpus mammilaris
** †Rhabdocarpus mansfieldi
** †Rhabdocarpus multistriatus
* †Rhinocaris
** †Rhinocaris ehlersi
* †Rhipidomella
** †Rhipidomella penelope – or unidentified comparable form
** †Rhipidomella trigona
** †Rhipidomella vanuxemi
* †Rhipidothyris
** †Rhipidothyris B – informal
* †Rhombotrypa
** †Rhombotrypa quadrata
** †Rhombotrypa subquadrata
* †Rhynchospirina
* †Rhynchotrema
** †Rhynchotrema minnesotensis – or unidentified comparable form
** †Rhynchotrema perlamellosum
* †Rugomena
** †Rugomena vetusta
* †Rutkowskicrinus
** †Rutkowskicrinus collieri – type locality for species
** †Rutkowskicrinus patriciae
* †Rutkowskiella – type locality for genus
** †Rutkowskiella tumula – type locality for species

## 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
* †Samaropsis
** †Samaropsis Newberryi
** †Samaropsis newberryi
* Fossils of the Cambrian mollusc Scenella †Scenella – tentative report
* †Schizophoria
** †Schizophoria ferronensis
** †Schizophoria mesacarina
** †Schizophoria tulliensis
* †Schuchertella
* †Scutellum
* †Semicoscinium
* †Semipora – tentative report
** †Semipora ehlersi
* †Serpulospira
** †Serpulospira diversiformis
* †Sigillaria
* †Sinuites
* †Spermatites
** †Spermatites cylix
** †Spermatites globosus
** †Spermatites reticulatus
* †Sphenophragmus
** †Sphenophragmus nanus
* Fossilized leaves and branches of the Devonian-Triassic horsetail relative Sphenophyllum †Sphenophyllum
** †Sphenophyllum bifurcatum
** †Sphenophyllum cuneifolium
** †Sphenophyllum emarginatum
** †Sphenophyllum majus
** †Sphenophyllum saxifragaefolium
* †Sphenopteris
* †Sphenopters
* †Spinocyrtia
** †Spinocyrtia clintoni
** †Spinocyrtia euryteines – report made of unidentified related form or using admittedly obsolete nomenclature
** †Spinocyrtia granulosa
* †Spinulicosta
** †Spinulicosta mutocosta
** †Spinulicosta spinulicosta
* †Spinyplatyceras
** †Spinyplatyceras bartlettense
* †Spirifer – report made of unidentified related form or using admittedly obsolete nomenclature
** †Spirifer consors
* †Spyroceras
* †Stereotoechus
** †Stereotoechus typicus – or unidentified comparable form
* Life restorations of a male (foreground) and female (background) of the Late Devonian-Carboniferous Chimaera relative Stethacanthus †Stethacanthus
** †Stethacanthus depressus
* †Stictoporina
** †Stictoporina granulifera
* †Stigmaria
** †Stigmaria verrucosa
* †Stigmatella
* †Stokesoceras
** †Stokesoceras engadinense – type locality for species
** †Stokesoceras gracile
** †Stokesoceras romingeri – type locality for species
* †Straparollus
** †Straparollus mortoni – type locality for species
* †Streblotrypa
** †Streblotrypa anomala
** †Streblotrypa hamiltonensis
* †Streptelasm
** †Streptelasm rusticum
* †Streptelasma
** †Streptelasma divaricans
** †Streptelasma huronensis
* †Striatopora
** †Striatopora linneana
* †Strobeus
** †Strobeus alternatus
* †Stromatocerium
** †Stromatocerium huronense
* †Stropheodonta
** †Stropheodonta demissa – or unidentified comparable form
* †Strophodonta
** †Strophodonta demissa
* Fossilized shell of the Ordovician-Silurian brachiopod Strophomena †Strophomena
** †Strophomena alpenensis
** †Strophomena costata
** †Strophomena crassa
** †Strophomena elongata
** †Strophomena erratica
** †Strophomena extenuata
** †Strophomena heteromys
** †Strophomena huronensis
** †Strophomena inaequiradiata
** †Strophomena levidensa
** †Strophomena neglecta
** †Strophomena nutans – or unidentified comparable form
** †Strophomena parvula
** †Strophomena pentagonia
** †Strophomena planumbona
** †Strophomena potterensis
** †Strophomena sulcata
** †Strophomena tenuicosta
** †Strophomena titan
* †Styliolina
** †Styliolina fissurella
* †Sulcoretepora
** †Sulcoretepora deissi
** †Sulcoretepora incisurata
** †Sulcoretepora B – informal
* Fossil of the Devonian tabulate coral Syringopora †Syringopora

## 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
* †Technophorus
** †Technophorus quincuncialis
* Fossilized shell of the Early Ordovician-Late Devonian probable mollusc Tentaculites †Tentaculites
** †Tentaculites bellulus
* †Tetradella
** †Tetradella regularis
** †Tetradella subquadratus
* †Tetradium
** †Tetradium huronense
* †Thamnopora
** †Thamnopora alpenensis
** †Thamnopora magniventra – type locality for species
* †Thamnoptychia
** †Thamnoptychia labyrinthica
** †Thamnoptychia minuitissima
** †Thamnoptychia silicensis
* †Trematis
** †Trematis rugosa
* Restoration showing the top (left) and underside of the Late Ordovician trilobite Triarthrus †Triarthrus
** †Triarthrus eatoni
* †Trigonacarpolithus
** †Trigonacarpolithus typicus
* †Trigonocarpus – report made of unidentified related form or using admittedly obsolete nomenclature
** †Trigonocarpus Noeggerathi
* †Trigonocarus
* †Trimerella
* †Trochonema
** †Trochonema wartheni
* †Tropidodiscus
** †Tropidodiscus compticarinatus – type locality for species
* †Tropidoleptus
** †Tropidoleptus carinatus
* †Truncalosia
** †Truncalosia gibbosa
* †Turbinilopsis
** †Turbinilopsis anacarina – type locality for species
* †Turbonitella
** †Turbonitella trunculinoda
* †Tylothyris
** †Tylothyris subvaricosa

## 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
* †Vanuxemia
** †Vanuxemia noquerrwnaia
** †Vanuxemia strattoni
* †Vladanella
** †Vladanella lirata – type locality for species

## 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
* †Warrenella
** †Warrenella laevis – or unidentified comparable form
* †Whitfieldella
* †Wisconsinella
** †Wisconsinella clelandi – type locality for species

## 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
* †Zeilleria
** †Zeilleria stellata
* †Zygospira
** †Zygospira modesta – or unidentified comparable form