List of the Paleozoic life of Ohio

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

• †Abylea – type locality for genus
  • †Abylea minuta – type locality for species
• †Acacocrinus
  • †Acacocrinus anebos
• †Acanthatia
• †Acanthoclema
  • †Acanthoclema lineatum
  • †Acanthoclema ohioensis
  • †Acanthoclema sulcatum
• †Acanthonema
  • †Acanthonema holopiforme
  • †Acanthonema newberryi
• †Acanthopecten
  • †Acanthopecten bellosum – type locality for species
  • †Acanthopecten carboniferus
• †Acanthotriletes
  • †Acanthotriletes aculeolatus
• †Achatella
• †Acidaspis
  • †Acidaspis cincinnatiensis
• †Acleistoceras – tentative report
• †Acmaeoblatta – type locality for genus
  • †Acmaeoblatta lanceolata – type locality for species
• †Acriora
  • †Acriora petala
• †Acteonina
  • †Acteonina hanseni – type locality for species
• †Actinodesma
  • †Actinodesma erectum
• †Actinopteria
  • †Actinopteria boydi
• †Acutichiton – type locality for genus
  • †Acutichiton pyrmidalus – type locality for species
• †Adamanterpeton – type locality for genus
  • †Adamanterpeton ohioensis – type locality for species
• †Aechmina
  • †Aechmina richmondensis
• †Aethaspis
• †Agelacrinites
  • †Agelacrinites southworthi – or unidentified comparable form
• †Agnesia
  • †Agnesia prosseri
• †Alaionema
  • †Alaionema crenulatum
• †Alaskozygopleura
  • †Alaskozygopleura gracillium
• †Alatisporites
  • †Alatisporites trialatus

• 

  †Alethopteris
• †Allocryptaspis
• †Alloiopteris
  • †Alloiopteris erosa
• †Allonema
• †Allonychia
• †Allorisma
  • †Allorisma costatum
• †Alveolites
  • †Alveolites labechii
• †Ambedus – type locality for genus
  • †Ambedus pusilus – type locality for species
• †Ambocoelia
  • †Ambocoelia norwoodi
  • †Ambocoelia umbonata
• †Ambonychia
  • †Ambonychia alata
  • †Ambonychia cultrata
  • †Ambonychia richmondensis
  • †Ambonychia suberecta
• †Ambozone
  • †Ambozone peoriensis – or unidentified comparable form
• †Ametroblatta
  • †Ametroblatta strigosa – type locality for species
• †Ameura
  • †Ameura missouriensis
• †Ammonidium
  • †Ammonidium hamatum
• †Amphilichas
• †Amphiscapha
  • †Amphiscapha catilloides
  • †Amphiscapha reedsi

• 

  †Amplexopora
  • †Amplexopora pustulosa
  • †Amplexopora robusta
• †Anaptychus – tentative report
  • †Anaptychus emersoni
• †Anartiocystis
  • †Anartiocystis foerstei
• †Anaspyroceras
• †Ancienta
  • †Ancienta ohioensis

• 

  †Annularia
  • †Annularia asteris
  • †Annularia radiata
  • †Annularia sphenophylloides
  • †Annularia stellata
• †Anomalocrinus
• †Anomalodonta
  • †Anomalodonta costata
• †Anomalotoechus
  • †Anomalotoechus tuberatus
• †Anostylostroma
  • †Anostylostroma columnare
  • †Anostylostroma laxum
• †Anozyga – type locality for genus
  • †Anozyga bulla – type locality for species
• †Anthracodromeus
  • †Anthracodromeus longipes – type locality for species
• †Anthracopupa – type locality for genus
  • †Anthracopupa ohioensis – type locality for species

• 

  †Anthracosaurus
  • †Anthracosaurus lancifer – type locality for species
• †Antiquaster
  • †Antiquaster magrumi
• †Antiquatonia
  • †Antiquatonia costata
  • †Antiquatonia portlockianus
• †Aparchites
  • †Aparchites minutissimus
  • †Aparchites oblongus
• †Aphelakardia
  • †Aphelakardia alternistriata
• †Aphlebia
• †Apiculatasporites
  • †Apiculatasporites acueatus
  • †Apiculatasporites latigranifer
  • †Apiculatasporites saetiger
  • †Apiculatasporites setulosus
• †Arabellites

• 

  †Archaeothyris
• †Archegogryllus – type locality for genus
  • †Archegogryllus priscus – type locality for species
• †Archinacella
  • †Archinacella rugatina
• †Arcochiton – type locality for genus
  • †Arcochiton raymondi – type locality for species

• 

  †Arctinurus
• †Arjamannia
  • †Arjamannia inexpectans
• †Armenoceras
• †Arthraria
  • †Arthraria biclavata
• †Arthroacantha
  • †Arthroacantha carpenteri
• †Arthropitys
• Arthropoma
  • †Arthropoma shafferi
• †Arthrostylus
• †Artisia
• †Ascodictyon
  • †Ascodictyon fusiforme
• †Asolanus
  • †Asolanus camptotaenia
  • †Asolanus sigillarioides
• †Aspidopora
  • †Aspidopora newberryi
• †Astartella
  • †Astartella clinata – type locality for species
  • †Astartella concentrica
  • †Astartella varica
  • †Astartella vera
• †Asterotheca
• †Atactoblatta – type locality for genus
  • †Atactoblatta anomala – type locality for species
• †Atactoechus
  • †Atactoechus typicus – or unidentified comparable form
• †Atactopora
• †Atactoporella
• †Ateleocystites
• †Athyris
  • †Athyris vittata
• †Atraktoprion
• †Atrypa

  • 

    †Atrypa reticularis
  • †Atrypa reticularus – report made of unidentified related form or using admittedly obsolete nomenclature
• †Augustoceras
• †Aulacella
• †Aulacera
  • †Aulacera nodulosa
• †Aulocystis
  • †Aulocystis auloporoidea
  • †Aulocystis auloporoides
  • †Aulocystis flabellata
  • †Aulocystis jacksoni
  • †Aulocystis lucasensis
• †Aulopora
  • †Aulopora microbuccinata
  • †Aulopora serpens
• †Austinella
  • †Austinella scovellei

• 

  †Aviculopecten
  • †Aviculopecten appalachianus – type locality for species
  • †Aviculopecten columbianus – type locality for species
  • †Aviculopecten coxanus
  • †Aviculopecten fasciculatus
  • †Aviculopecten occidentalis
  • †Aviculopecten princeps
  • †Aviculopecten winchelli
• †Aviculopinna
  • †Aviculopinna peracuta

• †Bactrites – tentative report
  • †Bactrites arkonensis – or unidentified comparable form
• Bairdia
  • †Bairdia devonica
• †Balbiniconcha
  • †Balbiniconcha hebe
• †Baldwinonus
  • †Baldwinonus dunkardensis
• †Barathrisphaeridium
  • †Barathrisphaeridium chagrinense
  • †Barathrisphaeridium pumilispinosum
• †Barbclabornia
  • †Barbclabornia luedersensis
• †Barychilina
• †Batostoma
  • †Batostoma varians
• †Batostomella
  • †Batostomella gracilis
  • †Batostomella striata
• †Baylea
  • †Baylea giffordi – or unidentified comparable form
  • †Baylea inclinata – type locality for species
• †Beatricea
  • †Beatricea undulata

• 

  †Bellerophon
  • †Bellerophon hyalina
  • †Bellerophon jeffersonensis
  • †Bellerophon newberryi
  • †Bellerophon pelops
  • †Bellerophon spergensis
  • †Bellerophon stevensianus
  • †Bellerophon stummi – type locality for species
  • †Bellerophon whittleseyi – type locality for species
• †Belodella
• †Beloitoceras
  • †Beloitoceras amoenum
• †Bembexia
  • †Bembexia adjutor – type locality for species
  • †Bembexia insolita
• Berenicea
• †Bethanyphyllum
  • †Bethanyphyllum robustum
• †Bicarina
  • †Bicarina petilitornata
• †Bickmorites
• †Bikocrinus
  • †Bikocrinus baios
• †Billingsastraea
  • †Billingsastraea longicarinata
• †Billingsastrea
  • †Billingsastrea longicarinata
• †Blattinopsis
  • †Blattinopsis americana – type locality for species
  • †Blattinopsis anthracina – type locality for species
  • †Blattinopsis latipennis – type locality for species
• †Bodmania
• †Bollia
  • †Bollia persulcata
  • †Bollia regularis
• †Botryllopora
  • †Botryllopora socialis
• †Botryocrinus
  • †Botryocrinus neimani
• †Bowmanites
  • †Bowmanites incurvata
  • †Bowmanites magna
• †Brachiospongia

• 

  †Brachydectes – type locality for genus
  • †Brachydectes newberryi – type locality for species
• †Brockocystis
  • †Brockocystis nodosaria
• †Broiliellus
  • †Broiliellus hektotopos – type locality for species
• †Bucanella
• †Bucania
  • †Bucania crassa
• †Bucanopsis
• †Buthotrephis
  • †Buthotrephis gracilis
• †Byssonychia
  • †Byssonychia grandis
  • †Byssonychia radiata
• Bythocypris
  • †Bythocypris cylindrica
  • †Bythocypris punctatus
• †Bythopora
  • †Bythopora delicatula
  • †Bythopora striata

• 

  †Calamites
  • †Calamites carinatus
  • †Calamites cisti
  • †Calamites citiifromis
  • †Calamites sachsi
  • †Calamites schützeiformis
  • †Calamites suckowi
  • †Calamites suckowii
  • †Calamites undulatus
• †Calamospora
  • †Calamospora breviradiata
  • †Calamospora hartungiana
  • †Calamospora straminea
• †Calamostachys
  • †Calamostachys bisporangiata – type locality for species
  • †Calamostachys germanica
  • †Calamostachys interculata – type locality for species
  • †Calamostachys longibracteata – type locality for species
  • †Calamostachys minuta – type locality for species
  • †Calamostachys recurvata – type locality for species
  • †Calamostachys tuberculata
• †Calapoecia
• †Calceocrinus
  • †Calceocrinus incertus
• †Callipleura
  • †Callipleura nobilis – or unidentified comparable form

• 

  †Callixylon
  • †Callixylon clevelandensis
  • †Callixylon newberryi
• †Calloporella
• †Calostylis – tentative report
  • †Calostylis lindstroemi
• †Calvibembexia
  • †Calvibembexia sulcomarginata
• †Camarotoechia
  • †Camarotoechia semiplicata

• 

  †Cameroceras
• †Cardiocarpon
• †Cardiomorpha
  • †Cardiomorpha missouriensis
• †Carneyella
  • †Carneyella foerstei
• †Caryocrinites
• †Catazone
  • †Catazone eversolensis – type locality for species
• †Catazyga
  • †Catazyga headi

• 

  †Catenipora
  • †Catenipora favositomima
  • †Catenipora favositomina
  • †Catenipora gotlandica
• †Caulopteris
  • †Caulopteris antiqua
  • †Caulopteris peregrina
• †Cayugaea
  • †Cayugaea intermittens
  • †Cayugaea transitorius – tentative report
• †Centroceras
• †Centrorhynchus (= Sartenaerus)
• †Ceramoporella
  • †Ceramoporella granulosa
  • †Ceramoporella ohioensis
• †Ceratocephala
• †Ceratoikiscum
  • †Ceratoikiscum bujugum
  • †Ceratoikiscum spinosiarcuatum
• †Ceratoikiscump
  • †Ceratoikiscump erittacanthinum
  • †Ceratoikiscump lanistellare
• †Ceratopsis
  • †Ceratopsis chambersi
  • †Ceratopsis oculifera
• †Ceraurinus
  • †Ceraurinus icarus
• †Ceraurus
• †Chaenomya
  • †Chaenomya leavenworthensis
• †Chagrinia
• †Chagrinichnites
• †Charactoceras
• †Chasmatopora

• 

  †Chasmops
• †Chaunograptus
• †Chiloporella
• †Chlidochirus
  • †Chlidochirus springeri
• †Chondrites
• †Chonetes
  • †Chonetes aurora – tentative report
  • †Chonetes deflectus
  • †Chonetes minutus
  • †Chonetes mucronatus – tentative report
• †Chonetina
  • †Chonetina choteauensis
• †Chonetinella
  • †Chonetinella flemingi
  • †Chonetinella verneuilana
  • †Chonetinella verneuiliana
• †Cincinnaticrinus
• †Cincinnatidiscus

• 

  †Cincinnetina
  • †Cincinnetina meeki
  • †Cincinnetina multisecta
• †Cirratriradites
  • †Cirratriradites annulatus
• †Cladochonus
• †Cladopora
  • †Cladopora bifurcata
  • †Cladopora crassa
  • †Cladopora lucasensis
  • †Cladopora minuitissima
  • †Cladopora roemeri

• 

  †Cladoselache
  • †Cladoselache clarki
• †Clarkesvillia
• †Clathrodictyon
  • †Clathrodictyon confertum
• †Clathrospira
• †Claudeonychia – type locality for genus
  • †Claudeonychia babini – type locality for species
• †Cleionychia
• †Clemetaocrinus
  • †Clemetaocrinus ohioensis
• †Clevelandodendron
  • †Clevelandodendron ohioensis

• 

  †Climacograptus
• †Clinopistha
  • †Clinopistha radiata
• †Coelocaulus
  • †Coelocaulus desiderata
  • †Coelocaulus strebloceras – tentative report
• †Coeloclema
  • †Coeloclema oweni
• †Coenites
• †Coleolus
  • †Coleolus iowensis

• 

  †Colosteus
  • †Colosteus scutellatus – type locality for species
• †Columnaria
  • †Columnaria calicina
• †Comasphaeridium
  • †Comasphaeridium caesariatum
• †Composita
  • †Composita subtilita
• †Compsocrinus
  • †Compsocrinus harrisi
• †Conchidium
• †Conradidium
  • †Conradidium firmamentum
• †Constellaria
• †Conularia
  • †Conularia formosa
• †Convolutispora
  • †Convolutispora mellita
• †Cordaianthus
• †Cordaites
  • †Cordaites principalis – or unidentified comparable form
• †Cornellites
  • †Cornellites flabellum

• 

  †Cornulites
  • †Cornulites flexuosus
• †Corocrinus
  • †Corocrinus noduosus
• †Corynotrypa
  • †Corynotrypa delicatula
  • †Corynotrypa inflata
• †Corythoecia
  • †Corythoecia dichoptera
• †Costatulites
  • †Costatulites richmondensis
• †Cranaena
  • †Cranaena romingeri
• Craniella
  • †Craniella hamiltonae
• †Crassisphaeridium
  • †Crassisphaeridium inusitatum
• †Crassispora
  • †Crassispora kosankei
• †Crenistriella
  • †Crenistriella rotalinea
• †Crenulazona
  • †Crenulazona angulata
• †Crepipora
• †Crurithyris
  • †Crurithyris planoconvexa
• †Cryptolithus
  • †Cryptolithus tesselata
• †Ctenacanthus
  • †Ctenacanthus compressus
• †Ctenerpeton
  • †Ctenerpeton remex – type locality for species
• †Ctenobolbina
  • †Ctenobolbina ciliata
  • †Ctenobolbina duryi
  • †Ctenobolbina hammeli
• †Ctenodonta
  • †Ctenodonta madisonensis
  • †Ctenodonta recurva
• †Ctenospondylus
  • †Ctenospondylus ninevehensis
• †Cuffeyella
  • †Cuffeyella arachnoidea
• †Cunctocrinus
  • †Cunctocrinus fortunatus – type locality for species
• †Cuneamya
  • †Cuneamya elliptica
  • †Cuneamya miamiensis
  • †Cuneamya scapha
• †Cupularostrum
  • †Cupularostrum prolificum
• †Cupulocrinus
• †Cycloconcha
• †Cyclocystoides
• †Cyclogranisporites
  • †Cyclogranisporites microgranus
  • †Cyclogranisporites minutus
  • †Cyclogranisporites obliquus
  • †Cyclogranisporites orbicularis
• †Cyclonema
  • †Cyclonema bilix
  • †Cyclonema gyronemoides
  • †Cyclonema humerosum
  • †Cyclonema minuta

• 

  †Cyclopteris
  • †Cyclopteris orbicularis
  • †Cyclopteris trichomanoides
• †Cyclora
  • †Cyclora depressa
  • †Cyclora hoffmani
  • †Cyclora parvula
  • †Cyclora pulcella
• †Cyclozyga
  • †Cyclozyga attenuata – type locality for species
  • †Cyclozyga mirabilis
• †Cylindrocoelia
• †Cylindrophyllum
  • †Cylindrophyllum delicatulum
  • †Cylindrophyllum delicatum
  • †Cylindrophyllum profundum
• †Cymatiosphaera
  • †Cymatiosphaera acinosa
  • †Cymatiosphaera adaiochorata
  • †Cymatiosphaera brevicrista
  • †Cymatiosphaera daioariochora
  • †Cymatiosphaera labyrinthica
  • †Cymatiosphaera parvicarina
  • †Cymatiosphaera rhacoamba
  • †Cymatiosphaera velicarina
• †Cymatonota
  • †Cymatonota constricta
  • †Cymatonota cylindrica
  • †Cymatonota parallela
  • †Cymatonota recta
  • †Cymatonota semistriata
• †Cymatospira
  • †Cymatospira alternodosa – type locality for species
  • †Cymatospira montfortianus
• †Cyperites
• †Cyphotrypa
  • †Cyphotrypa clarksvillensis
• †Cypricardinia
  • †Cypricardinia indenta
• Cypridina
  • †Cypridina herzeri
• †Cyrtentactinia
  • †Cyrtentactinia cibdelosphaera
  • †Cyrtentactinia primotica
• †Cyrtina
  • †Cyrtina alpenensis
  • †Cyrtina hamiltonensis
  • †Cyrtina umbonata
• †Cyrtocerina
• †Cyrtodonta
  • †Cyrtodonta halli
• †Cyrtodontula
• †Cyrtolites
  • †Cyrtolites claysferryensis
  • †Cyrtolites inornatum
  • †Cyrtolites ornatus
  • †Cyrtolites retrorsus
• †Cyrtospira
  • †Cyrtospira directus

• 

  †Cyrtospirifer
• †Cystaster
• †Cystiphylloides
  • †Cystiphylloides americanum
• †Cystodictya
  • †Cystodictya hamiltonensis
  • †Cystodictya incisurata
• Cythere
  • †Cythere ohioensis
• Cytherella
  • †Cytherella unioniformis

• †Dalmanella
• †Danaeites
  • †Danaeites emersonii

• 

  †Decadocrinus
  • †Decadocrinus hughwingi
  • †Decadocrinus stewartae
  • †Decadocrinus wrightae
• †Deceptrix
  • †Deceptrix albertina
• †Dechenella
  • †Dechenella alpenensis
  • †Dechenella lucasensis
• †Dekayella
• †Dekayia
• †Deltodus
• †Deltoidospora
  • †Deltoidospora levis
  • †Deltoidospora priddyi
• †Denayella
  • †Denayella rotalia
• †Dendrocrinus
  • †Dendrocrinus daytonensis
• †Derbyia
  • †Derbyia crassa
• †Dermatostroma
  • †Dermatostroma scabrum
• †Desmoinesia
  • †Desmoinesia muricatina
• †Devonalosia
  • †Devonalosia wrightorum
• †Devonochonetes
  • †Devonochonetes coronatus
  • †Devonochonetes fragilis
  • †Devonochonetes scitulus
• †Devonorhineoderma
  • †Devonorhineoderma hyphantes
• †Diaphorochroa
  • †Diaphorochroa ganglia
• †Dicalamophyllum

• 

  †Diceratosaurus
  • †Diceratosaurus brevirostris – type locality for species
• †Dicranopora
  • †Dicranopora emacerata
• †Dictyoclostus
  • †Dictyoclostus semireticulatus
• †Dictyonema
• †Dictyotomaria
  • †Dictyotomaria capillaria
  • †Dictyotomaria scitula – or unidentified comparable form
• †Diestoceras
  • †Diestoceras eos
  • †Diestoceras indianense
  • †Diestoceras shideleri
• †Diexallophasis
  • †Diexallophasis absona
  • †Diexallophasis cuspidis
• †Dinichthys
  • †Dinichthys herzeri
• †Dinophyllum
  • †Dinophyllum semilunum
  • †Dinophyllum stokesi
• †Dinorthis
  • †Dinorthis carleyi
• †Diphyphyllum

• 

  †Diploceraspis
• †Diplograptus
  • †Diplograptus recurrens
• Discina
• †Discotrypa
• †Dithyrocaris
  • †Dithyrocaris neptuni – or unidentified comparable form
• †Ditomopyge
  • †Ditomopyge decurtata
  • †Ditomopyge scitula
• †Divietipellis
  • †Divietipellis robusta

• 

  †Dolichopterus
  • †Dolichopterus asperatus
• †Donaldiella
• †Donaldina
  • †Donaldina bellilineata – or unidentified comparable form
  • †Donaldina pygmaea – tentative report
  • †Donaldina robusta – type locality for species
  • †Donaldina stevensana – type locality for species
• †Dorsennidium
  • †Dorsennidium patulum
• †Doryblatta – type locality for genus
  • †Doryblatta longipennis – type locality for species
• †Douvillina
  • †Douvillina distans
• †Drepanella
  • †Drepanella richardsoni
• †Drepanoistodus
• †Drymocrinus
  • †Drymocrinus geniculatus
• †Dunbarella
  • †Dunbarella knighti – or unidentified comparable form
  • †Dunbarella striata

• 

  †Dunkleosteus
  • †Dunkleosteus raveri – type locality for species
• †Dvorakia
• †Dystactocrinus
  • †Dystactocrinus constrictus
• †Dystactospongia

• †Ecclimadictyon
• †Ecdyceras
  • †Ecdyceras foerstei
• †Echinocaris
  • †Echinocaris multinodosa
  • †Echinocaris multispinosis
  • †Echinocaris ohioensis – type locality for species
  • †Echinocaris pulchra – type locality for species
  • †Echinocaris punctata
  • †Echinocaris sublevis
• †Echinocoelia
• †Echinoconchus
  • †Echinoconchus punctatus
• †Echinolichas
  • †Echinolichas lucasensis
• †Ecmelostoiba
  • †Ecmelostoiba asymmetrica
  • †Ecmelostoiba leptoderma
• †Economolopsis
  • †Economolopsis anodontoides
• †Ectenocrinus
  • †Ectenocrinus simplex
• †Ecthymabrachion
  • †Ecthymabrachion camptos
• †Edmondia
  • †Edmondia aspenwallensis
  • †Edmondia aspinwallensis
  • †Edmondia nebrascensis
  • †Edmondia nodulifera – type locality for species
• †Edon
  • †Edon oblonga
• †Elasmonema
  • †Elasmonema bellatula
  • †Elasmonema clarki
  • †Elasmonema corrugata – type locality for species
  • †Elasmonema imitator
  • †Elasmonema lichas

• 

  †Eldredgeops
  • †Eldredgeops rana
• †Elegantilites – tentative report
• †Elektoriskos
  • †Elektoriskos apodasmios
  • †Elektoriskos arcetotricus
  • †Elektoriskos lasios
• †Eliasopora
  • †Eliasopora stellatum
• †Elita
• †Elpe
  • †Elpe cincinnatiensis
  • †Elpe irregularis
  • †Elpe ulrichi
• †Elrodoceras
• †Emmonsia
  • †Emmonsia arbuscula
  • †Emmonsia radiciformis
• †Endelocrinus
  • †Endelocrinus kieri – type locality for species

• 

  †Endoceras
• †Endosporites
  • †Endosporites globiformis
  • †Endosporites plicatus
  • †Endosporites zonalis
• †Endothyra
  • †Endothyra kennethi
• †Endothyranella
  • †Endothyranella inflata
  • †Endothyranella intermissa
  • †Endothyranella minuta – or unidentified comparable form
  • †Endothyranella nitida – or unidentified comparable form
  • †Endothyranella stormi – or unidentified comparable form
• †Entactinia
  • †Entactinia additiva
  • †Entactinia cometes
  • †Entactinia crustescens
  • †Entactinia exilispina
  • †Entactinia herculea
  • †Entactinia micula
  • †Entactinia monalloea
  • †Entactinia pantosompha
  • †Entactinia paula
  • †Entactinia quantilla
  • †Entactinia somphorhips
  • †Entactinia spongites
  • †Entactinia sychnacanthina
• †Entactinosphaera
  • †Entactinosphaera diplostraca
  • †Entactinosphaera dystactotata
  • †Entactinosphaera echinata – tentative report
  • †Entactinosphaera erebenna
  • †Entactinosphaera esostrongyla
  • †Entactinosphaera euthlasta
  • †Entactinosphaera fredericki
  • †Entactinosphaera hapala
  • †Entactinosphaera hystricosa
  • †Entactinosphaera inusitata
  • †Entactinosphaera polyacanthina
  • †Entactinosphaera riedeli
  • †Entactinosphaera symphypora
  • †Entactinosphaera tretactinia
  • †Entactinosphaera variacanthina
• †Entactinosphaerap
  • †Entactinosphaerap alimbola
• †Enteletes
  • †Enteletes hemiplicata
• †Eochonetes
  • †Eochonetes clarksvillensis
  • †Eochonetes clarkvillensis
• †Eomarginifera
  • †Eomarginifera longispinus
• †Eomyelodactylus
  • †Eomyelodactylus rotundatus
• †Eomylodactylus
  • †Eomylodactylus rotundatus
• †Eotrophina
• †Ephelopalla
  • †Ephelopalla elongata
  • †Ephelopalla talea

• 

  †Erettopterus
  • †Erettopterus saetiger
• †Eridoconcha
  • †Eridoconcha rugosa
• †Eridorthis
• †Eridotrypa
• †Erisocrinus
  • †Erisocrinus typus
• †Erpetosaurus
  • †Erpetosaurus radiatus – type locality for species
• †Escharopora
• †Estiastra
  • †Estiastra culcita
  • †Estiastra dilatostella
  • †Estiastra rugosa

• 

  †Eucalyptocrinites
• †Euchondria
  • †Euchondria neglecta
  • †Euchondria ohioensis – type locality for species
  • †Euchondria pellucida
• †Euconospira
  • †Euconospira turbiniformis
• †Eunicites
• †Euomphalus
  • †Euomphalus planodorsatus
  • †Euomphalus similis
• †Euphemites
  • †Euphemites carbonarius
  • †Euphemites enodis – type locality for species
  • †Euphemites multiliratus – type locality for species
  • †Euphemites nodocarinatus
  • †Euphemites subglobosus
  • †Euphemites vittatus
• †Eurymya
• †Euryocrinus – tentative report
  • †Euryocrinus laddii

• 

  †Eurypterus
  • †Eurypterus ornatus
• †Eusauropleura – type locality for genus
  • †Eusauropleura digitata – type locality for species
• †Eutaxocrinus
  • †Eutaxocrinus wideneri
• †Evenkiella
• †Exilisphaeridium
  • †Exilisphaeridium simplex
• †Exochoderma
  • †Exochoderma irregulare
  • †Exochoderma ramibrachium

• †Faberia
  • †Faberia anomala
• †Faberoceras
• †Favistella

• 

  †Favosites
  • †Favosites dentistabulatus
  • †Favosites discoideus
  • †Favosites favosus
  • †Favosites hamiltonae
  • †Favosites hamiltoniae
  • †Favosites hisingeri
  • †Favosites turbinatus
• †Fayettoceras
• †Fenestella
  • †Fenestella shumardi
• †Fenestrellina
  • †Fenestrellina rockportensis
• †Fistulipora
  • †Fistulipora vesiculata

• 

  †Flexicalymene
  • †Flexicalymene meeki
• †Florinites
  • †Florinites florini
  • †Florinites mediapudens
  • †Florinites milloti
  • †Florinites similis
  • †Florinites visendus
• †Foerstia
  • †Foerstia ohioensis
• †Fusispira

• 

  †Fusulina
  • †Fusulina secalica

0 Links

• †Gamizyga
  • †Gamizyga corpulentissima
  • †Gamizyga girtyi – type locality for species
  • †Gamizyga morningstarae
• †Gerablattina
  • †Gerablattina richmondiana – type locality for species
• †Gigantopteris – or unidentified comparable form

• 

  †Gilbertsocrinus
  • †Gilbertsocrinus alpenensis
  • †Gilbertsocrinus ohioensis
• †Gillespieisporites
  • †Gillespieisporites venustus
• †Girtyspira
  • †Girtyspira minuta
• †Glabrocingulum
  • †Glabrocingulum beedei – type locality for species
  • †Glabrocingulum grayvillense
  • †Glabrocingulum stellaeformis
  • †Glabrocingulum wannense – or unidentified comparable form
• †Globodoma
  • †Globodoma nodosa
• †Globozyga
  • †Globozyga reticulata
  • †Globozyga subcorpulenta – type locality for species
• †Glossites
  • †Glossites subtenuis
• †Glyptocardia
  • †Glyptocardia speciosa

• 

  †Glyptocrinus
  • †Glyptocrinus richardsoni
• †Glyptorthis
  • †Glyptorthis daytonensis – type locality for species
  • †Glyptorthis fausta – type locality for species
  • †Glyptorthis insculpta
• †Gomphostrobus
• †Goniasma
  • †Goniasma lasallense – or unidentified comparable form
• †Gonioloboceras
• †Gorbyoceras
• †Gorogonisphaeridium
  • †Gorogonisphaeridium absitum
  • †Gorogonisphaeridium elongatum
  • †Gorogonisphaeridium evexispinosum
  • †Gorogonisphaeridium ohioense
  • †Gorogonisphaeridium plerispinosum
  • †Gorogonisphaeridium separatum
• †Gosseletia
  • †Gosseletia triquetra
• †Gosselettia
  • †Gosselettia triquetra
• †Graciloceras
• †Grammysia
  • †Grammysia arcuata
  • †Grammysia bellatula
  • †Grammysia bisulcata
  • †Grammysia constricta
  • †Grammysia nodocostata
  • †Grammysia sylvanensis
• †Grammysioidea
• †Granasporites
  • †Granasporites medius
• †Granulatisporites
  • †Granulatisporites granulatus
  • †Granulatisporites minutus
  • †Granulatisporites parvus
  • †Granulatisporites piroformis
• †Graptodictya
  • †Graptodictya perelegans

• 

  †Grewingkia
  • †Grewingkia rusticum
• †Guttatisphaeridium
  • †Guttatisphaeridium pandum
• †Gypidula

• †Habrostroma
  • †Habrostroma beachvillensis
  • †Habrostroma larocquei
  • †Habrostroma marpleae
• †Hallinetes
  • †Hallinetes setigera

• 

  †Hallopora
  • †Hallopora bassleri
  • †Hallopora flabellaris
  • †Hallopora libana
  • †Hallopora nicklesi
  • †Hallopora subnodosa
• †Halysites
  • †Halysites catenularis
  • †Halysites catenularius
  • †Halysites nitidus
• †Hamiltonella
  • †Hamiltonella punctulifera
• †Haplentactinia
  • †Haplentactinia arrhinia
  • †Haplentactinia rhinophyusa
• †Hawletrochus
  • †Hawletrochus macrostomus
• †Hebertella
  • †Hebertella alveata
  • †Hebertella occidentalis
  • †Hebertella sinuata
  • †Hebertella subjugata
• †Hebertocaris
  • †Hebertocaris wideneri
• †Hederella
  • †Hederella alpenensis
  • †Hederella bilineata
  • †Hederella cirrhosa
  • †Hederella concinnoides
  • †Hederella delicatula
  • †Hederella filiformis
  • †Hederella magna
  • †Hederella parvirugosa
  • †Hederella rectifurcata
  • †Hederella reimanni
  • †Hederella thedfordensis
  • †Hederella vagans
• †Helcionopsis
• †Helicelasma
  • †Helicelasma rusticum
• †Helicotoma
• †Heliolites

• 

  †Heliophyllum
  • †Heliophyllum bathycalyx
  • †Heliophyllum halli
  • †Heliophyllum microcarinatum
• †Helminthochiton
  • †Helminthochiton simplex
• †Helminthozyga
  • †Helminthozyga costellata – type locality for species
  • †Helminthozyga undulata – type locality for species
• †Helopora
  • †Helopora inexpectata
• †Hemicystites
• †Hemiphragma
• †Hemizyga
  • †Hemizyga attenuata
  • †Hemizyga elegans – or unidentified comparable form
  • †Hemizyga illineata – or unidentified comparable form
• †Heracloceras – tentative report
  • †Heracloceras inelegans – tentative report
• †Hercostrophia
  • †Hercostrophia robusta
• †Heslerodus
  • †Heslerodus divergens
• †Hessonia
  • †Hessonia priscus
• †Heterocrinus
  • †Heterocrinus exiguus
  • †Heterocrinus exilis
  • †Heterocrinus heterodactylus
  • †Heterocrinus juvenis
  • †Heterocrinus pentagonus
• †Heteronema – tentative report
• †Heterophrentis
  • †Heterophrentis simplex
• †Heterorthina
  • †Heterorthina fairmountensis
• †Heterotrypa

• 

  †Hexagonaria
  • †Hexagonaria anna
  • †Hexagonaria stewartae
  • †Hexagonaria tabulata
  • †Hexagonaria truncata
• †Hexameroceras
• †Hindella
• †Hindia
• †Hippocardia
  • †Hippocardia herricki – type locality for species
  • †Hippocardia hydei – type locality for species
  • †Hippocardia monroica
  • †Hippocardia ohioense
• †Hiscobeccus
  • †Hiscobeccus capax
• †Hoareicardia
  • †Hoareicardia cunea
• †Holoeciscus
  • †Holoeciscus auceps

• 

  †Holopea
• †Holoptychus – or unidentified comparable form
• †Holtedahlina
  • †Holtedahlina sulcata
• †Homotrypa
  • †Homotrypa wortheni
• †Homotrypella
  • †Homotrypella dubia
• †Hormotoma
  • †Hormotoma centervillensis – type locality for species
• †Hormotomina
  • †Hormotomina maia
• †Hudsonaster
  • †Hudsonaster incomptus
• †Hustedia
  • †Hustedia mormoni
• †Hyattidina

• 

  †Hyolithes
  • †Hyolithes dubius
  • †Hyolithes parviusculus
  • †Hyolithes versaillensis
• †Hypergonia
  • †Hypergonia jonathanensis – type locality for species
• †Hyperoblastus
  • †Hyperoblastus reimanni
• †Hyphantozyga
  • †Hyphantozyga cancellata – type locality for species
  • †Hyphantozyga fusiforma – type locality for species
  • †Hyphantozyga gracilis
  • †Hyphantozyga grandis – type locality for species
  • †Hyphantozyga knighti
  • †Hyphantozyga perattenuata
  • †Hyphantozyga pulchra
  • †Hyphantozyga textilis – type locality for species
• †Hypselentoma
  • †Hypselentoma inornata
• †Hystriculina
  • †Hystriculina wabashensis

• †Ianthinopsis
  • †Ianthinopsis melanoides – type locality for species
• †Ibanocrinus
  • †Ibanocrinus petalos
• †Ichthyerpeton
  • †Ichthyerpeton squamosum – type locality for species
• †Icriodus
  • †Icriodus angustus
  • †Icriodus arkonensis
  • †Icriodus brevis
  • †Icriodus eriensis
  • †Icriodus excavatus
  • †Icriodus expansus
  • †Icriodus janeae
  • †Icriodus lindensis
  • †Icriodus obliquimarginatus
  • †Icriodus ohioensis
  • †Icriodus platyobliquimarginatus
  • †Icriodus regularicrescens
• †Indospora
  • †Indospora stewartii
• †Intrapora
  • †Intrapora irregularis
• †Iocrinus
• †Ischyrodonta
  • †Ischyrodonta truncata
  • †Ischyrodonta unionoides
• †Isodectes
  • †Isodectes obtusus – type locality for species
• †Isonema
  • †Isonema depressum
• †Isorophus
  • †Isorophus austini
  • †Isorophus holbrooki
  • †Isorophus warrenensis
• †Isorthoceras
  • †Isorthoceras albersi

• 

  †Isotelus
  • †Isotelus maximus
  • †Isotelus megistos

• †Jedria
  • †Jedria ventrica
• †Jonesella
  • †Jonesella crepidiformis
  • †Jonesella pedigera
• †Jonesites
  • †Jonesites inornatus
  • †Jonesites marginatus
• †Jugiaster
  • †Jugiaster speciosus
• †Juresania
  • †Juresania ovalis

• †Kindleoceras

• 

  †Kionoceras
• †Kockelella
  • †Kockelella ortus
  • †Kockelella ranuliformis
  • †Kockelella walliseri
• †Kophinocrinus – tentative report
  • †Kophinocrinus magrumi – tentative report
• †Kyreocrinus
  • †Kyreocrinus constellatus

• †Labechia
• †Laccoprimitia
  • †Laccoprimitia centralis
• †Laevigatosporites
  • †Laevigatosporites desmoinesensis
  • †Laevigatosporites globosus
  • †Laevigatosporites medius
  • †Laevigatosporites minimus
  • †Laevigatosporites minor
  • †Laevigatosporites ovalis
  • †Laevigatosporites subadnatoides
  • †Laevigatosporites vulgaris
• †Lambeoceras
• †Lanthanaster
  • †Lanthanaster cruciformis – type locality for species
• †Lasiograptus
• †Latericriodus
  • †Latericriodus latericrescens
• †Latosporites
  • †Latosporites minutus
• †Lechritrochoceras
• †Leioclema
  • †Leioclema alpenense
  • †Leioclema alpense
• †Leiorhynchus
  • †Leiorhynchus kelloggi
  • †Leiorhynchus laura
  • †Leiorhynchus lucasi
• †Leiosphaeridia
• †Leiotriletes
  • †Leiotriletes granoornatus
  • †Leiotriletes levis
  • †Leiotriletes microsaetosus
  • †Leiotriletes pseudaculeatus
  • †Leiotriletes subadnatoides
• †Lepadocystis
• †Leperditia
  • †Leperditia glabra
• †Lepidocoleus
• †Lepidocyclus
  • †Lepidocyclus perlamellosum
• †Lepidocystis

• 

  †Lepidodendron
  • †Lepidodendron aculeatum
  • †Lepidodendron andrewsi
  • †Lepidodendron jaraczewskii – or unidentified comparable form
  • †Lepidodendron scutatum
• †Lepidolites
• †Lepidophloios
  • †Lepidophloios larcinus
  • †Lepidophloios vaningeni
• †Lepidostrobophyllum
• †Leptaena
  • †Leptaena gibbosa
  • †Leptaena richmondensis
• †Leptobolus
  • †Leptobolus insignis
• †Leptodesma
  • †Leptodesma ausablensis
  • †Leptodesma matheri – or unidentified comparable form
  • †Leptodesma rhysema – type locality for species
• †Leptograptus
• †Leptophractus – type locality for genus
  • †Leptophractus obsoletus – type locality for species
• †Leptopoterion
• †Leptoptygma
  • †Leptoptygma newtonensis – type locality for species
• †Leptotrypa
• †Leptotrypella
  • †Leptotrypella ohioensis
• †Lescuropteris
  • †Lescuropteris moorii
• †Levizygopleura
  • †Levizygopleura inornata
  • †Levizygopleura williamsi
• †Lichenocrinus
  • †Lichenocrinus tuberculata
• †Limipecten
  • †Limipecten lamellus – type locality for species
• †Limoptera
  • †Limoptera curvata
  • †Limoptera macroptera
• Lingula
  • †Lingula carbonaria
  • †Lingula meeki
  • †Lingula melie
• †Lingulichnus
• †Lingulops
• †Linoproductus
  • †Linoproductus cora
  • †Linoproductus prattenianus
• †Linopteris
  • †Linopteris muensteri
  • †Linopteris neuropteroides
• †Lioclemella
• †Liospira
  • †Liospira affinis
  • †Liospira depressum – type locality for species
• †Liroceras – tentative report
• †Lodanaria
  • †Lodanaria quadricarinata – type locality for species
• †Logocrinus – tentative report
  • †Logocrinus brandoni – tentative report
• †Longispina
  • †Longispina lissohybus
• †Longstaffia – tentative report
  • †Longstaffia centervillensis – type locality for species
• †Lopholasma
  • †Lopholasma delawarensis
• †Lophonychia
  • †Lophonychia cordata
• †Lophophyllidium
  • †Lophophyllidium profundum
• †Lophospira
  • †Lophospira milleri
  • †Lophospira perangulata
• †Lophotriletes
  • †Lophotriletes granoornatus

• 

  †Loxomma
  • †Loxomma lintonensis – type locality for species
• †Loxonema
  • †Loxonema pikensis
• †Loxoplocus
  • †Loxoplocus gothlandicus – type locality for species
• †Lycospora
  • †Lycospora granulata
  • †Lycospora micropapillata
  • †Lycospora orbicula
  • †Lycospora pellucida
  • †Lycospora pusilla
  • †Lycospora subjuga
  • †Lycospora torquifer
• †Lyopora
  • †Lyopora goldfussi
• †Lyriopecten
  • †Lyriopecten mitchelli
• †Lyrodesma
  • †Lyrodesma major

• †Macrerpeton
  • †Macrerpeton huxleyi – type locality for species
• †Macrochilina
  • †Macrochilina humilis
• †Maelonoceras
• †Manitoulinoceras
  • †Manitoulinoceras gyroforme
  • †Manitoulinoceras williamsae

• 

  †Manticoceras
• †Manticrinus
  • †Manticrinus exaitos
• †Marsupiocrinus
• †Maryonychia
  • †Maryonychia concordensis
• †Mastigograptus
  • †Mastigograptus strictus
• †Mazostachys
  • †Mazostachys compacta – type locality for species
• †Mediospirifer
  • †Mediospirifer audaculus
• †Meekopinna
  • †Meekopinna americana
• †Meekospira
  • †Meekospira peracuta
• †Megacanthopora
  • †Megacanthopora fallacis – or unidentified comparable form
• †Megacystites

• 

  †Megalocephalus – type locality for genus
  • †Megalocephalus lineolatus – type locality for species
• †Megalograptus
• †Megastrophia
  • †Megastrophia concava
• †Megistocrinus
  • †Megistocrinus depressus
• †Melocrinus
  • †Melocrinus clarkei
• †Meristospira
  • †Meristospira michiganensis
• †Merocrinus
• †Mesocoelia
  • †Mesocoelia obstipisutura
• †Mesopalaeaster
  • †Mesopalaeaster finei
  • †Mesopalaeaster wilberanus
• †Mesothyra
• †Mesotrypa
  • †Mesotrypa orbiculata
• †Metaxys
  • †Metaxys fossa – type locality for species
• †Miamoceras
• †Michelinoceras
• †Micrhystridium
  • †Micrhystridium adductum
  • †Micrhystridium complurispinosum
  • †Micrhystridium erugatum
  • †Micrhystridium flexibile
  • †Micrhystridium inusitatum
  • †Micrhystridium profusam
• †Microceras
• †Microdoma
  • †Microdoma tricarinatus
• †Microptychis
  • †Microptychis cerithiformis
  • †Microptychis expetendus
  • †Microptychis occabus – type locality for species
  • †Microptychis turbineus
• †Microreticulatisporites
  • †Microreticulatisporites harrisonii
  • †Microreticulatisporites nobilis
  • †Microreticulatisporites sulcatus
• †Milleratia
• †Mitrospermum
  • †Mitrospermum vinculum
• †Mixoneura
• †Modiolodon
  • †Modiolodon subovalis
• †Modiolopsis
  • †Modiolopsis capax
  • †Modiolopsis modiolaris
  • †Modiolopsis versaillesensis
• Modiolus
  • †Modiolus fountainensis
  • †Modiolus radiatus – type locality for species
  • †Modiolus waverliensis
• †Modiomorpha
  • †Modiomorpha concentrica
  • †Modiomorpha concentricum
  • †Modiomorpha mytiloides
  • †Modiomorpha subalata
  • †Modiomorpha subalta
• †Molgophis – type locality for genus
  • †Molgophis macrurus – type locality for species
• †Monotrypa
• †Monticulipora
• †Mourlonia
  • †Mourlonia plena
  • †Mourlonia textus

• 

  †Mucrospirifer
  • †Mucrospirifer alpenensis
  • †Mucrospirifer grabaui – or unidentified comparable form
  • †Mucrospirifer mucronatus
  • †Mucrospirifer prolificus
• †Multiplicisphaeridium
  • †Multiplicisphaeridium anastomosis
  • †Multiplicisphaeridium verrucarum
• †Muraticavea
  • †Muraticavea enteichia
• †Murchisonia
  • †Murchisonia anderdoniae
  • †Murchisonia dublinensis – type locality for species
  • †Murchisonia gracilicrista
  • †Murchisonia intermedia – type locality for species
  • †Murchisonia leda
  • †Murchisonia minuta
  • †Murchisonia sibleyensis
  • †Murchisonia subcarinata
  • †Murchisonia subulata
• †Myalina
  • †Myalina pernaformis
• †Myelodactylus – or unidentified comparable form
• †Mytilarca
  • †Mytilarca cordata

• †Naevisphaeridium
  • †Naevisphaeridium plenilunium
• †Narthecoceras
  • †Narthecoceras dunni – type locality for species

• 

  †Naticopsis
  • †Naticopsis aequistriata – type locality for species
  • †Naticopsis comperta
  • †Naticopsis genevievensis
  • †Naticopsis levis
  • †Naticopsis ziczac – type locality for species
• †Navifusa
  • †Navifusa drosera
• †Neilsonia
  • †Neilsonia uninodocarinata
• †Neochonetes
  • †Neochonetes granulifer
  • †Neochonetes variolata
• †Neospirifer
  • †Neospirifer cameratus
  • †Neospirifer dunbari
• †Nephriticeras – tentative report
• †Nereidavus
  • †Nereidavus varians
• †Neumatoceras

• 

  †Neuropteris
  • †Neuropteris heterophylla
  • †Neuropteris ovata
  • †Neuropteris scheuchzeri
• †Nicholsonella
  • †Nicholsonella peculiaris
• †Nicollidina
  • †Nicollidina remscheidensis
• †Nodonema
  • †Nodonema granulatum
• †Nucleocrinus
  • †Nucleocrinus elegans – or unidentified comparable form

• 

  Nucula
  • †Nucula corbuliformis
• Nuculana
• †Nucularca
  • †Nucularca cingulata
• †Nuculites
  • †Nuculites faberi
  • †Nuculites fabula
  • †Nuculites oblongatus
  • †Nuculites triqueter
• †Nuculopsis
  • †Nuculopsis beyrichi
  • †Nuculopsis elongata
  • †Nuculopsis girtyi
  • †Nuculopsis shumardana – or unidentified related form
• † Nyassa
  • †Nyassa recta

• 

  †Odonterpeton – type locality for genus
  • †Odonterpeton triangulare – type locality for species
• †Odontopleura
• †Odontopteris
  • †Odontopteris aequalis
  • †Odontopteris brardii
• †Oehlertella
  • †Oehlertella stoutella
• †Oestocephalus – type locality for genus
  • †Oestocephalus amphiuminum – type locality for species
• †Ohiocrinus
  • †Ohiocrinus laxus
  • †Ohiocrinus oehanus
• †Olenoides
• †Onchus
• †Oncoceras
• †Onniella
• †Onychochilus
  • †Onychochilus abruptum – type locality for species
• †Oomoceras

• 

  †Ophiacodon
  • †Ophiacodon uniformis – or unidentified comparable form
• †Opisthoptera
• †Opsiocrinus
  • †Opsiocrinus mariae
• †Orbiculoidea
  • †Orbiculoidea capuliformis
  • †Orbiculoidea herzeri
  • †Orbiculoidea missouriensis
  • †Orbiculoidea newberryi
• †Orthis – tentative report
• †Orthoceras
  • †Orthoceras trusitum
  • †Orthoceras type locality for species – informal
• †Orthodesma
  • †Orthodesma canaliculatum
• †Orthonema
  • †Orthonema salteri
  • †Orthonema subtaeniatum
• †Orthonota
  • †Orthonota undulata
• †Orthonybyoceras – tentative report
• †Orthonychia
  • †Orthonychia chesterense – tentative report
  • †Orthonychia herzeri
  • †Orthonychia infabricatus – type locality for species
  • †Orthonychia parva
  • †Orthonychia sciotoensis – type locality for species
  • †Orthonychia waverlyensis
• †Orthopleura
• †Orthorhynchula
  • †Orthorhynchula linneyi
• †Ortonella
• †Oulodus
  • †Oulodus equirectis
  • †Oulodus equirectus
• †Oxyprora
  • †Oxyprora missouriensis
• †Ozarkodina
  • †Ozarkodina bohemica
  • †Ozarkodina confluens
  • †Ozarkodina remscheidenesis
  • †Ozarkodina sagitta
  • †Ozarkodina tillmani

• †Pachydictya
  • †Pachydictya bifurcata
• †Paiderocrinus
  • †Paiderocrinus asketos
  • †Paiderocrinus ochthos
• †Palacanthus
  • †Palacanthus acutus
• †Palaeocapulus
  • †Palaeocapulus equilateralis
  • †Palaeocapulus morsei – type locality for species
• †Palaeoconcha
• †Palaeolima
  • †Palaeolima retifera
  • †Palaeolima triplistriata
• †Palaeoneilo
  • †Palaeoneilo bedfordensis
  • †Palaeoneilo bownockeri
  • †Palaeoneilo constricta – or unidentified related form
  • †Palaeoneilo oweni
• †Palaeonucula
  • †Palaeonucula lunulata – type locality for species
  • †Palaeonucula subrotundata
• †Palaeopalaemon
  • †Palaeopalaemon elegans – type locality for species
• †Palaeophycus
• †Palaeoporites
• †Palaeoscenidium
  • †Palaeoscenidium cladophorum
  • †Palaeoscenidium quadriramosum
• †Palaeostachya
  • †Palaeostachya aperta
  • †Palaeostachya decacnema
  • †Palaeostachya elongata
  • †Palaeostachya ovalis
  • †Palaeostachya trabeculata – type locality for species
• †Palaeostylus
  • †Palaeostylus marvinwelleri
  • †Palaeostylus minuta
  • †Palaeostylus venustus
• †Palaeotrochus
  • †Palaeotrochus kearnyi
• †Palaeozygopleura
  • †Palaeozygopleura hamiltoniae
  • †Palaeozygopleura joani
  • †Palaeozygopleura laeviusculum
  • †Palaeozygopleura parvula
  • †Palaeozygopleura sibleyensis
• †Paleofavosites
  • †Paleofavosites prolificus
• †paleoporites
• †Paleschara
• †Paliphyllum
  • †Paliphyllum brassfieldense
  • †Paliphyllum primarium
  • †Paliphyllum regulare
• †Panderodus
  • †Panderodus unicostatus
• †Paracyclas
  • †Paracyclas lirata
  • †Paracyclas proavia
• †Paracyrtolites
  • †Paracyrtolites carinatus
• †Paragoniozona
  • †Paragoniozona granulostriata – or unidentified comparable form
• †Parajuresania
  • †Parajuresania nebrascensis
• †Paraliospira
  • †Paraliospira rugata
• †Parallelocrinus
  • †Parallelocrinus sturgeoni – type locality for species
• †Parallelodon
  • †Parallelodon irvinensis
  • †Parallelodon obsoletus
  • †Parallelodon tenuistriatus

• 

  †Paraspirifer
  • †Paraspirifer bownockeri
• †Parazyga
• †Parvohallopora
  • †Parvohallopora onealli
  • †Parvohallopora ramosa
• †Pasceolus
  • †Pasceolus camdenensis
• †Patellilabia
• †Patelliocrinus – type locality for genus
  • †Patelliocrinus planus – type locality for species
• †Pattersonia
• †Paupospira
  • †Paupospira bowdeni
  • †Paupospira trilineata – type locality for species
  • †Paupospira tropidophora

• 

  †Pecopteris
  • †Pecopteris arborescens
  • †Pecopteris candolleana
  • †Pecopteris cyathea
  • †Pecopteris hemitelioides
  • †Pecopteris lamuriana
  • †Pecopteris miltonii
  • †Pecopteris unita
• †Penniretepora
  • †Penniretepora irregularis – or unidentified comparable form
• †Pennoceras
  • †Pennoceras seamani
• †Pentamerus
• †Permophorus
  • †Permophorus oblongus
  • †Permophorus subcostatus
  • †Permophorus tropidophorus
• †Pernopecten
  • †Pernopecten ohioensis
  • †Pernopecten prosseri
• †Peronopora
  • †Peronopora decipiens
• †Petalodus

  • 

    †Petalodus ohioensis
• †Petigopora
  • †Petigopora offfula
• †Petraster
• †Petrocrania
  • †Petrocrania hamiltonensis
  • †Petrocrania laelia
  • †Petrocrania modesta
  • †Petrocrania scabiosa
• †Petrozium
  • †Petrozium pelagicum
• †Pharkidonotus
  • †Pharkidonotus breyeri – type locality for species
  • †Pharkidonotus labioreflexus – type locality for species
  • †Pharkidonotus percarinatus
• †Phestia
  • †Phestia inflata
  • †Phestia pandoraeformis
• †Philhedra
  • †Philhedra crenistriatula

• 

  †Phlegethontia – type locality for genus
  • †Phlegethontia linearis – type locality for species
  • †Phlegethontia longissima – type locality for species
• †Pholadella
  • †Pholadella radiata
• †Pholadomorpha
  • †Pholadomorpha pholadiformis
• †Pholidops
• †Pholidostrophia
  • †Pholidostrophia geniculata
  • †Pholidostrophia gracilis
  • †Pholidostrophia nacrea
• †Phragmoceras
• †Phragmolites
  • †Phragmolites elegans – type locality for species
• †Phragmosphaera
  • †Phragmosphaera lyra
• †Phylloporina
• †Phyloblatta
  • †Phyloblatta jeffersoniana – type locality for species
• †Phymatopleura
  • †Phymatopleura brazoensis
  • †Phymatopleura nodosa
• †Phyrgilocrinus
  • †Phyrgilocrinus batheri
• †Phyrtosaster – type locality for genus
  • †Phyrtosaster casteri – type locality for species
• †Physonemus
  • †Physonemus striatus – or unidentified comparable form
• †Physotomya
• †Pianodesma
• Pinna
  • †Pinna missouriensis
• †Pityosporites
  • †Pityosporites westphalensis
• †Placopterina
  • †Placopterina ohioensis – type locality for species

• 

  †Plaesiomys
  • †Plaesiomys subquadrata
• †Plagiascetus – type locality for genus
  • †Plagiascetus lateralis – type locality for species
• †Plagioglypta
• †Planalveolitella
  • †Planalveolitella parasitica
• †Planisporites
  • †Planisporites granifer
• †Planoendothyra
  • †Planoendothyra associata
  • †Planoendothyra evoluta
  • †Planoendothyra orbiculata
  • †Planoendothyra ovata – or unidentified comparable form
  • †Planoendothyra whitesidei – or unidentified comparable form

• 

  †Platyceras
  • †Platyceras attenuatum
  • †Platyceras bucculentum
  • †Platyceras carinatum
  • †Platyceras cymbium
  • †Platyceras erectum
  • †Platyceras lineatum
  • †Platyceras nasutum
  • †Platyceras rarispinum
  • †Platyceras subglobosa – type locality for species
  • †Platyceras thetis
• †Platycoryphe

• 

  †Platyrhinops – type locality for genus
  • †Platyrhinops lyelli – type locality for species
• †Platystrophia
  • †Platystrophia actilirata
  • †Platystrophia acutilirata
  • †Platystrophia annieana
  • †Platystrophia auburnensis
  • †Platystrophia clarksvillensis
  • †Platystrophia corryvillensis
  • †Platystrophia crassa
  • †Platystrophia cummingsi
  • †Platystrophia cypha
  • †Platystrophia elkhornensis
  • †Platystrophia foerstei
  • †Platystrophia hopensis
  • †Platystrophia laticosta
  • †Platystrophia moritura
  • †Platystrophia morrowensis
  • †Platystrophia nitida
  • †Platystrophia pauciplicata
  • †Platystrophia ponderosa
  • †Platystrophia sublaticosta
  • †Platystrophia wallowayi
• †Plectodina
• †Plectonotus
  • †Plectonotus boucoti
• †Plectorthis
  • †Plectorthis aequivalvis
  • †Plectorthis fissicosta
  • †Plectorthis jamesi
  • †Plectorthis neglecta
  • †Plectorthis plicatella
• †Plethospira

• 

  †Pleurodictyum
  • †Pleurodictyum cornu
  • †Pleurodictyum plana
• †Pleuronotus
  • †Pleuronotus decewi
• †Pleuroptyx – type locality for genus
  • †Pleuroptyx clavatus – type locality for species
• †Pleurorthoceras
  • †Pleurorthoceras clarksvillense
• †Plexadictyon
• †Plocezyga
  • †Plocezyga acuminata
  • †Plocezyga conica
  • †Plocezyga cordiformis
  • †Plocezyga costata – type locality for species
  • †Plocezyga delicata
  • †Plocezyga excellens
  • †Plocezyga intermedia
  • †Plocezyga lineata
  • †Plocezyga lirata
  • †Plocezyga markae
  • †Plocezyga ornata – type locality for species
  • †Plocezyga ornatissima
  • †Plocezyga percostata
  • †Plocezyga perminuta
  • †Plocezyga regularia
  • †Plocezyga subnodosa
  • †Plocezyga turbinata
• †Podolithus
• †Poleumita
  • †Poleumita incarinatus
• †Polidevcia
  • †Polidevcia bellistriata
  • †Polidevcia stevensiana
• †Polyentactinia
  • †Polyentactinia craticulata
  • †Polyentactinia leptosphaera
  • †Polyentactinia plecta
  • †Polyentactinia polygonia

• 

  †Polygnathus
  • †Polygnathus eiflius
  • †Polygnathus intermedius
  • †Polygnathus linguiformis
  • †Polygnathus pseudofoliatus
  • †Polygnathus strongi
  • †Polygnathus xylus
• †Polypora
  • †Polypora valida – or unidentified comparable form
• Pontocypris
  • †Pontocypris acuminata
• †Poroblattina
  • †Poroblattina brachyptera – type locality for species
  • †Poroblattina lata – type locality for species
  • †Poroblattina ohioensis – type locality for species
  • †Poroblattina richmondiana – type locality for species
  • †Poroblattina rotundata – type locality for species
• †Posidonia
  • †Posidonia girtyi
• †Praenucula
• †Primiriopsis
  • †Primiriopsis punctulifera
• †Primitia
  • †Primitia cincinnatiensis
  • †Primitia rudis
• †Primitiella
  • †Primitiella claypolei
  • †Primitiella whitfieldi
• †Probillingsites
  • †Probillingsites lebanonensis
• Proboscina
  • †Proboscina auloporoides
  • †Proboscina frondosa
• †Proctothylacocrinus
  • †Proctothylacocrinus esseri
  • †Proctothylacocrinus longus
• †Productus
  • †Productus semireticulatua

• 

  †Proetus
• †Promopalaeaster
  • †Promopalaeaster granulosus
  • †Promopalaeaster wykoffi
• †Promytilus
  • †Promytilus pottsvillensis – type locality for species
• †Propora
  • †Propora conferta
  • †Propora eminula
• †Prosserella
  • †Prosserella lucasi
  • †Prosserella subtransversa
• †Protaraea
  • †Protaraea richmondensis
• †Protarea
• †Protathyris – tentative report
• †Protobalanus
  • †Protobalanus spinicoronatus – type locality for species
• †Protocycloceras
  • †Protocycloceras rushense
• †Protokionoceras
• †Protoleptostrophia
  • †Protoleptostrophia perplana
• †Protosalvinia
  • †Protosalvinia arnoldii
  • †Protosalvinia ravenna
• †Protoscolex

• 

  †Prototaxites
  • †Prototaxites clevelandensis
• †Pseudaviculopecten
  • †Pseudaviculopecten fasciculatus
  • †Pseudaviculopecten scabridus
• †Pseudoactinodictyon
  • †Pseudoactinodictyon stearni
  • †Pseudoactinodictyon vagans
• †Pseudoatrypa
  • †Pseudoatrypa devoniana
• †Pseudobigalea
  • †Pseudobigalea crista
• †Pseudocolpomya
  • †Pseudocolpomya miseneri
• †Pseudolingula
• †Pseudomonotis
  • †Pseudomonotis equistriata
  • †Pseudomonotis hawni
  • †Pseudomonotis millhorni – type locality for species
• †Pseudomulceodens
  • †Pseudomulceodens cancellatus
• †Pseudooneotodus
  • †Pseudooneotodus bicornis
• †Pseudophorus
  • †Pseudophorus antiquus
• †Pseudorthoceras
  • †Pseudorthoceras knoxense
• †Pseudozygopleura
  • †Pseudozygopleura acuminata
  • †Pseudozygopleura angustata
  • †Pseudozygopleura assertonsoris
  • †Pseudozygopleura baltea – type locality for species
  • †Pseudozygopleura cirritus
  • †Pseudozygopleura contractus
  • †Pseudozygopleura deloi
  • †Pseudozygopleura eximia
  • †Pseudozygopleura funis
  • †Pseudozygopleura girtyi
  • †Pseudozygopleura gradatus
  • †Pseudozygopleura irrugata
  • †Pseudozygopleura kellettae – or unidentified comparable form
  • †Pseudozygopleura lanceolatus
  • †Pseudozygopleura limus
  • †Pseudozygopleura macra – or unidentified comparable form
  • †Pseudozygopleura mucronatus
  • †Pseudozygopleura multicostata – or unidentified comparable form
  • †Pseudozygopleura pagoda – or unidentified comparable form
  • †Pseudozygopleura palus – type locality for species
  • †Pseudozygopleura pandus
  • †Pseudozygopleura peoriense
  • †Pseudozygopleura pinquicula
  • †Pseudozygopleura plummeri – type locality for species
  • †Pseudozygopleura pluricostata
  • †Pseudozygopleura pugonis
  • †Pseudozygopleura pulchra
  • †Pseudozygopleura rectus
  • †Pseudozygopleura schucherti – or unidentified comparable form
  • †Pseudozygopleura scitula
  • †Pseudozygopleura scruposus
  • †Pseudozygopleura semicostata
  • †Pseudozygopleura sinuosior
  • †Pseudozygopleura subulatus
  • †Pseudozygopleura tenuivirga
  • †Pseudozygopleura variegata
• †Psiloconcha
  • †Psiloconcha grandis
  • †Psiloconcha inornata
  • †Psiloconcha sinuata
• †Pterinea
  • †Pterinea corrugatus
  • †Pterinea demissa
• †Pterinopecten
  • †Pterinopecten undosus
• †Pterochiton
  • †Pterochiton carbonarius
  • †Pterochiton spatulatus
• †Pterospermella
  • †Pterospermella capitana
  • †Pterospermella latibalteus
  • †Pterospermella radiata
  • †Pterospermella solis
• †Pterotheca

• 

  †Pterygotus
  • †Pterygotus carmani
• †Ptilodictya
• †Ptomatis
  • †Ptomatis proteiforme
• †Ptotosalvinia
  • †Ptotosalvinia furcata
• †Ptychocarpus
• †Ptychocrinus
• †Ptychomphalina
  • †Ptychomphalina lucina
  • †Ptychomphalina regulata
• †Ptychopteria
  • †Ptychopteria flabellum
• †Ptychospirina
  • †Ptychospirina varians
• †Ptyonius
  • †Ptyonius marshii – type locality for species
• †Pugnax
  • †Pugnax utah
• †Punctatisporites
  • †Punctatisporites aerarius
  • †Punctatisporites glaber
  • †Punctatisporites minutus
  • †Punctatisporites obesus
• †Punctatisporties
  • †Punctatisporties minutus
• †Punctatosporites
  • †Punctatosporites granifer
  • †Punctatosporites minutus
  • †Punctatosporites rotundus
• †Punctospirifer
  • †Punctospirifer kentuckensis
• †Pustula
  • †Pustula pertenuis
• †Pustulisphaeridium
  • †Pustulisphaeridium levibrachium
• †Pyanomya
• †Pycnocrinus
• †Pyrenomeous

• †Quadrijugator

• †Rafinesquina
  • †Rafinesquina alternata
  • †Rafinesquina loxorhytis
  • †Rafinesquina ponderosa
  • †Rafinesquina squamula
• †Raistrickia
  • †Raistrickia crinita
  • †Raistrickia srinita
• †Ramphoprion
• †Raphistoma
• †Rasmussenoceras
• †Reinschospora
  • †Reinschospora magnifica
• †Renalcis
• †Reptaria
  • †Reptaria stolonifera
• †Reteocrinus
• †Reteporina
  • †Reteporina striata
• †Retichonetes
• †Reticulatisporites
  • †Reticulatisporites muricatus
• †Retispira
  • †Retispira fascireticulatus – type locality for species
  • †Retispira tenuilineata
  • †Retispira waverliensis
• †Retrorsirostra
  • †Retrorsirostra carleyi
• †Rhachicrinus
  • †Rhachicrinus wrighti
• †Rhachiopteris
• †Rhapanocrinus
• †Rhegmaphyllum
  • †Rhegmaphyllum daytonensis
• †Rhinidictya
• †Rhinocaris
  • †Rhinocaris ehlersi
• †Rhipidomella
  • †Rhipidomella pecosi
  • †Rhipidomella penelope – or unidentified comparable form
  • †Rhipidomella trigona
  • †Rhipidomella vanuxemi
• †Rhipidothyris

• 

  †Rhizocorallium
• †Rhombodictyon
• †Rhombopora
  • †Rhombopora lepidodendroides
• †Rhombotrypa
  • †Rhombotrypa subquadrata
• †Rhopolonaria
  • †Rhopolonaria venosa
• †Rhynchopora
• †Rhynchotrema
  • †Rhynchotrema denatum
  • †Rhynchotrema dentatum
• †Rhynchotreta
• †Rhytimya
  • †Rhytimya compressa
  • †Rhytimya faberi
  • †Rhytimya lunulata
  • †Rhytimya oehana
  • †Rhytimya radiata
• †Richmondoceras
  • †Richmondoceras brevicameratum
• †Rizoceras
• †Ropalonaria
• †Royalella
  • †Royalella quadrolirata – type locality for species
  • †Royalella swallowiana – type locality for species
• †Ruedemannia
  • †Ruedemannia trilix – type locality for species
• †Rugomena
  • †Rugomena vetusta
• †Rugosochonetes

• 

  †Rusophycus
  • †Rusophycus biloba

• †Saccella
  • †Saccella parva
• †Salpingostoma
  • †Salpingostoma richmondensis – tentative report
• †Samaropsis
• †Sanguinolites
  • †Sanguinolites cuneatus
  • †Sanguinolites hekitoensis – type locality for species

• 

  †Sauropleura – type locality for genus
  • †Sauropleura pectinata – type locality for species
• †Schellwienella
• †Schistoceras
• †Schizambon – tentative report
• †Schizoblatta – type locality for genus
  • †Schizoblatta alutacea – type locality for species
• †Schizocrania
  • †Schizocrania filosa
• †Schizodus
  • †Schizodus acuminatus – type locality for species
  • †Schizodus affinis
  • †Schizodus appressus
  • †Schizodus chesterensis – or unidentified comparable form
  • †Schizodus curtus
  • †Schizodus subcircularis
  • †Schizodus wheeleri
• †Schizolopha
• †Schizophoria
  • †Schizophoria ferronensis
  • †Schizophoria impressa
• †Schlotheimophyllum
  • †Schlotheimophyllum benedicti
  • †Schlotheimophyllum patellatum
• †Schuchertella
  • †Schuchertella interstriata
• †Schuchertoceras
• †Scolithos
  • †Scolithos laxata
• †Sedgwickia – tentative report
• †Semicoscinium
• †Semipora – tentative report
  • †Semipora ehlersi
• †Septopora
  • †Septopora biserialis
  • †Septopora robusta
• †Serpulites
• †Serpulospira
  • †Serpulospira diversiformis
• †Sevillia
  • †Sevillia sevillensis
  • †Sevillia trinucleata
• †Shansiella
  • †Shansiella beckwithana
  • †Shansiella carbonaria
  • †Shansiella insecta
• †Shideleroceras

• 

  †Sigillaria
  • †Sigillaria brardii
  • †Sigillaria elegans
  • †Sigillaria ficoides
  • †Sigillaria lacoei
  • †Sigillaria laurenciana
  • †Sigillaria mamillaris
  • †Sigillaria orbicularis
  • †Sigillaria pileata – type locality for species
  • †Sigillaria rugosa
• †Sigillariostrobus
• †Silfonocrinus
  • †Silfonocrinus siluricus
• †Silicaster
  • †Silicaster esseri
• †Similodonta – tentative report
• †Sinuites
  • †Sinuites cancellatus
  • †Sinuites granistriatus
  • †Sinuites subcompressa

• 

  Solemya
  • †Solemya radiata
  • †Solemya sharonensis – type locality for species
• †Soleniscus
  • †Soleniscus aplatus – type locality for species
  • †Soleniscus klipparti
  • †Soleniscus primigenia
  • †Soleniscus primogenium
  • †Soleniscus regularis
  • †Soleniscus typicus
• †Solenomorpha
  • †Solenomorpha lamborni
• †Solisphaeridium
  • †Solisphaeridium astrum
  • †Solisphaeridium clavum
  • †Solisphaeridium folliculum
  • †Solisphaeridium rigispinosum
• †Sowerbyella
  • †Sowerbyella rugosa
• †Spatiopora
• †Sphenolium
• †Sphenophragmus
  • †Sphenophragmus nanus – or unidentified comparable form

• 

  †Sphenophyllum
  • †Sphenophyllum majus
  • †Sphenophyllum oblongifolium
• †Sphenopteris
  • †Sphenopteris elegans – or unidentified comparable form
  • †Sphenopteris minutisecta
• †Sphenosphaera
  • †Sphenosphaera centervillensis – type locality for species
  • †Sphenosphaera fiscellostriata – type locality for species
  • †Sphenosphaera opertus – type locality for species
  • †Sphenosphaera recurvus – type locality for species
• †Sphenothallus
• †Spiloblattina
  • †Spiloblattina variegata – type locality for species
• †Spinocyrtia
  • †Spinocyrtia euryteines – report made of unidentified related form or using admittedly obsolete nomenclature
• †Spinosporites
  • †Spinosporites exiguus
• †Spinulicosta
  • †Spinulicosta spinulicosta
• †Spinyplatyceras
  • †Spinyplatyceras dumosum

• 

  †Spirifer
  • †Spirifer opimus
  • †Spirifer pennatus
• †Spiromphalus
  • †Spiromphalus pervius – type locality for species
• Spiropteris
• Spirorbis
  • †Spirorbis arkonensis
  • †Spirorbis planum
• †Spiroscala
  • †Spiroscala solida
• †Spongentactinella
  • †Spongentactinella veles
• †Sporangites
  • †Sporangites huronensis
• †Spyroceras
• †Staufferoceras
• †Stegocoelia
  • †Stegocoelia copei – or unidentified comparable form
• †Stegops
  • †Stegops newberryi – type locality for species
• †Stellinium
  • †Stellinium cristatum
  • †Stellinium inflatum
  • †Stellinium octoaster
• †Stelodictyon
• †Stereoaster
  • †Stereoaster squamosus
• †Stereostylus
  • †Stereostylus amesensis
• †Stereotoechus
  • †Stereotoechus typicus – or unidentified comparable form

• 

  †Stethacanthus
  • †Stethacanthus altonensis
• †Stibarocrinus
  • †Stibarocrinus centervillensis
• †Stictoporella
• †Stictoporina
  • †Stictoporina granulifera
• †Stigmatella
  • †Stigmatella catenulata
  • †Stigmatella crenulata
  • †Stigmatella dychei
• Stomatopora
• †Straparollus
  • †Straparollus hecale – or unidentified comparable form
  • †Straparollus rudis – or unidentified comparable form
• †Strataster
  • †Strataster devonicus
• †Streblochondria
• †Streblopteria
  • †Streblopteria oklahomensis
• †Streblotrypa
  • †Streblotrypa anomala
  • †Streblotrypa hamiltonensis
• †Streptaster
  • †Streptaster vorticellatus
• †Streptelasma
  • †Streptelasma divaricans
• †Striatopora
  • †Striatopora flexuosa
  • †Striatopora intermittens
• †Strobeus
  • †Strobeus brevis
  • †Strobeus immanis
  • †Strobeus intercalaris
  • †Strobeus paludinaeformis
• †Stromatocerium
  • †Stromatocerium granulosum
• †Stromatopora
• †Strombodes
  • †Strombodes socialis
• †Strophalosia
  • †Strophalosia truncata
• †Stropheodonta
  • †Stropheodonta demissa
• †Strophodonta
  • †Strophodonta demissa – report made of unidentified related form or using admittedly obsolete nomenclature

• 

  †Strophomena
  • †Strophomena concordensis
  • †Strophomena erratica
  • †Strophomena extenuata
  • †Strophomena maysvillensis
  • †Strophomena neglecta
  • †Strophomena nutans
  • †Strophomena planoconvexa
  • †Strophomena planumbona
  • †Strophomena sulcata
• †Strophostylus
• †Sturgeonospira – type locality for genus
  • †Sturgeonospira tortula – type locality for species
• †Stygetoblatta – type locality for genus
  • †Stygetoblatta latipennis – type locality for species
• †Styliolina
  • †Styliolina fissurella
• †Stylonema
  • †Stylonema robusta
• †Subulites
  • †Subulites planilateralis – type locality for species
• †Sulcoretepora
  • †Sulcoretepora deissi
  • †Sulcoretepora incisurata
• †Synhomalonotus
• †Syntomopterus
  • †Syntomopterus richardsoni

• 

  †Syringopora – tentative report
  • †Syringopora reteformis
• †Syringostroma
  • †Syringostroma cylindricum
  • †Syringostroma densum
  • †Syringostroma nodulatum
  • †Syringostroma pustulosum
• †Syringothyris
  • †Syringothyris bedfordensis
• †Syscioblatta
  • †Syscioblatta anomala – type locality for species
  • †Syscioblatta minor – type locality for species
  • †Syscioblatta misera – type locality for species
  • †Syscioblatta obscura – type locality for species
  • †Syscioblatta steubenvilleana – type locality for species
• †Sysciophlebia
  • †Sysciophlebia acutipennis – type locality for species
  • †Sysciophlebia adumbrata – type locality for species
  • †Sysciophlebia affinis – type locality for species
  • †Sysciophlebia balteata
  • †Sysciophlebia benedicta – type locality for species
  • †Sysciophlebia hybrida – type locality for species
  • †Sysciophlebia nana – type locality for species
  • †Sysciophlebia obtusa – type locality for species
  • †Sysciophlebia picta – type locality for species
  • †Sysciophlebia rotundata – type locality for species
  • †Sysciophlebia schucherti – type locality for species
  • †Sysciophlebia scudderi – type locality for species
  • †Sysciophlebia variegata – type locality for species
  • †Sysciophlebia whitei – type locality for species

• †Taeniaster
  • †Taeniaster elegans
• †Taeniopteris
  • †Taeniopteris lescuriana
  • †Taeniopteris newberriana
• †Tamiobatis
  • †Tamiobatis vetustus
• †Tanaocrinus
• †Tasmanites
• †Technophora
• †Technophorus – type locality for genus
  • †Technophorus faberi – type locality for species
• †Teichichnus
• †Temnocheilus
  • †Temnocheilus forbesianus

• 

  †Tentaculites
  • †Tentaculites bellulus
  • †Tentaculites gracilistriatus
• †Tetradium
• †Tetranota
  • †Tetranota bidorsata
• †Tetrentactinia
  • †Tetrentactinia barysphaera
  • †Tetrentactinia gracilispinosa
  • †Tetrentactinia quadrispinosa
  • †Tetrentactinia somphosphaera
  • †Tetrentactinia somphozona
  • †Tetrentactinia spongacea
  • †Tetrentactinia teuchestes
• †Thamnoptychia
  • †Thamnoptychia alpenensis
  • †Thamnoptychia labyrinthica
  • †Thamnoptychia minuitissima
  • †Thamnoptychia projecta – tentative report
  • †Thamnoptychia silicensis
• †Thymospora
  • †Thymospora obscura
  • †Thymospora pseudothiessenii
• †Tirocrinus
  • †Tirocrinus trochos
• †Tomoceras
  • †Tomoceras gilliana – or unidentified comparable form
• †Torispora
  • †Torispora securis
• †Tornacia
  • †Tornacia stela
• †Tornoceras
  • †Tornoceras uniagnulare
  • †Tornoceras uniangulare
• †Toryniferella
• †Trachydomia
• †Tremanotus
• †Trematis
  • †Trematis millepunctata
  • †Trematis millepuntata
  • †Trematis reticularis
• †Trematopora
• †Trepospira
  • †Trepospira illinoisensis

• 

  †Treptoceras
  • †Treptoceras byrnesi
  • †Treptoceras cincinnatiensis
  • †Treptoceras duseri
  • †Treptoceras fosteri
• †Triarthrus
• †Triendoceras – tentative report
  • †Triendoceras davisi
• †Trigonoglossa
  • †Trigonoglossa nebrascensis
• †Trigrammaria
• †Trilonche
  • †Trilonche cancellicula
  • †Trilonche prolata
• †Trimerella
• †Triquitrites
  • †Triquitrites additus
  • †Triquitrites bransonii
  • †Triquitrites crassus
  • †Triquitrites minutus
  • †Triquitrites sculptilis
  • †Triquitrites spinosus
  • †Triquitrites subspinosus – or unidentified comparable form
  • †Triquitrites tribullatus
• †Trocholites
• †Trochonema
• †Trochonemopsis
  • †Trochonemopsis meekanum
• †Troedssonoceras
• †Tropidodiscus
  • †Tropidodiscus vesculilineatus – type locality for species
• †Tropidoleptus
  • †Tropidoleptus carinatus
• †Truncatiramus – now regarded as a jr. synonym of Erettopterus^[1][2]
  • †Truncatiramus perryensis
• Trypetesa
  • †Trypetesa caveata
• †Trypherocrinus
  • †Trypherocrinus brassfieldensis
• †Tuberculatosporites
  • †Tuberculatosporites robustus

• 

  †Tuditanus – type locality for genus
  • †Tuditanus punctulatus – type locality for species
• †Turbocrinus
  • †Turbocrinus paunctum
• †Turbonopsis
  • †Turbonopsis shumardii
• †Typanocrinus
  • †Typanocrinus strombos

• †Ulrichia
  • †Ulrichia nodosa
• †Umbotropis
  • †Umbotropis filitexta – type locality for species
• †Uncinisphaera
  • †Uncinisphaera lappa
• †Unellium
  • †Unellium ampullium
  • †Unellium elongatum
  • †Unellium oscitans
• †Unklesbayella – type locality for genus
  • †Unklesbayella geinitzi

• 

  †Urasterella
  • †Urasterella grandis

• †Vanuxemia
  • †Vanuxemia waynesvillensis – type locality for species
• †Vaupelia
• †Vermiforichnus
  • †Vermiforichnus clarkei – or unidentified comparable form
• †Verrucosisporites
  • †Verrucosisporites cerosus
  • †Verrucosisporites donarii
  • †Verrucosisporites henshawensis
  • †Verrucosisporites microtuberosus
  • †Verrucosisporites microtuerosus
  • †Verrucosisporites verrucosus
• †Veryhachium
  • †Veryhachium roscidum
  • †Veryhachium trispinosoides
• †Vesicaspora
  • †Vesicaspora wilsonii
• †Vestispora
  • †Vestispora fenestrata
  • †Vestispora laevigata
• †Vinella
• †Vinlandostrophia
  • †Vinlandostrophia acutilirata
  • †Vinlandostrophia ponderosa
• †Vorticina
  • †Vorticina cyrtolites

• †Waagenella
  • †Waagenella crassus

• 

  †Walchia
• †Walchiostrobus
• †Walliserodus
  • †Walliserodus sancticlairi
• †Welleria – tentative report
• †Westonoceras
• †Whidbornella
• †Whiteavesia
• †Whitfieldella
• †Whitfieldoceras
• †Wilkingia
  • †Wilkingia andrewsi
  • †Wilkingia maxvillensis
  • †Wilkingia terminale
• †Wilsonites
  • †Wilsonites vesicatus
• †Worthenia
  • †Worthenia parvula
  • †Worthenia speciosa
  • †Worthenia strigillata
  • †Worthenia tabulata
• †Wurmiella
  • †Wurmiella excavata

• †Xenocrinus

• 

  †Xyloiulus
  • †Xyloiulus bairdi – type locality for species
• †Xysmacrinus
  • †Xysmacrinus greenensis

• †Zascinaspis
• †Zirocrinus
  • †Zirocrinus litos
• †Zittelloceras
• †Zonalosporites
  • †Zonalosporites ellipticus

• 

  †Zoophycos
• †Zygocycloides
  • †Zygocycloides magnus
• †Zygospira
  • †Zygospira cincinnatiensis
  • †Zygospira modesta

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved December 17, 2021.