List of the Paleozoic life of Indiana

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

• †Abatocrinus
  • †Abatocrinus grandis

• 

  †Abrotocrinus
  • †Abrotocrinus coreyi
  • †Abrotocrinus nodosus
  • †Abrotocrinus unicus
• †Acacocrinus
  • †Acacocrinus americanus
• †Acanthopecten
  • †Acanthopecten procarboniferous
• †Achistrum
  • †Achistrum brevis – type locality for species
  • †Achistrum ludwigi
  • †Achistrum nicholsoni
  • †Achistrum triassicum
• †Achradocrinus
• †Acidaspis
• †Acinophyllum
  • †Acinophyllum davisi – type locality for species
• †Acratia
  • †Acratia similaris
• †Acrocrinus
  • †Acrocrinus constrictus
• † Acrophyllum
  • †Acrophyllum ellipticum
  • †Acrophyllum oneidaense
  • †Acrophyllum rugosum

• 

  †Actinocrinites
  • †Actinocrinites gibsoni
  • †Actinocrinites grandissimus
  • †Actinocrinites lobatus – tentative report
  • †Actinocrinites lowei
• †Actinopteria
  • †Actinopteria boydi
• †Actinostroma
• †Adinocrinus
  • †Adinocrinus nodosus
• †Aemuliophyllum
  • †Aemuliophyllum exiguum
• †Aganaster
  • †Aganaster gregarius
• †Agaricocrinites
• †Agaricocrinus

  • 

    †Agaricocrinus americanus
• †Agassizocrinus
  • †Agassizocrinus gibbosus – or unidentified comparable form
  • †Agassizocrinus laevis – or unidentified comparable form
• †Ageneracrinus
  • †Ageneracrinus basalotumidus
• †Ahrensisporites
  • †Ahrensisporites guerickei
• †Aipoceras – tentative report
• †Alaskadiscus
  • †Alaskadiscus magnus
• †Alatisporites
  • †Alatisporites trialatus

• 

  †Alethopteris
  • †Alethopteris davreuxi
  • †Alethopteris decurrens
  • †Alethopteris grandini
  • †Alethopteris lonchitica
  • †Alethopteris owenii
  • †Alethopteris serlii
• †Alisocrinus
  • †Alisocrinus aureatus
  • †Alisocrinus caleyi
  • †Alisocrinus laevis
• †Allocrinus
  • †Allocrinus benedicti
• †Allocystites
  • †Allocystites hammeli
• †Alloprosallocrinus
  • †Alloprosallocrinus conicus
• †Allorhynchus
  • †Allorhynchus curriei
• †Alveolites
  • †Alveolites asperus
  • †Alveolites constans
  • †Alveolites dispansus
  • †Alveolites expatiatus
  • †Alveolites goldfussi
  • †Alveolites minimus
  • †Alveolites mordax
  • †Alveolites squamosus
  • †Alveolites winchellana
• †Amaurotoma
  • †Amaurotoma leavenworthana – type locality for species
  • †Amaurotoma subangulatum – type locality for species
• †Ambocoelia
• †Ambonychia
  • †Ambonychia obesa
  • †Ambonychia robusta
  • †Ambonychia suberecta
• Ammobaculites
  • †Ammobaculites leptos
  • †Ammobaculites pyriformis
• Ammodiscus
  • †Ammodiscus longexsertus
• †Ammonellipsites
• †Ammovertella
  • †Ammovertella inclusa
• †Ampheristocystis
  • †Ampheristocystis concentricus
• †Amphipora
• †Amphipsalidocrinus – type locality for genus
  • †Amphipsalidocrinus inconsuetus
  • †Amphipsalidocrinus scissurus – type locality for species
• †Amphissites
  • †Amphissites similaris
• †Amphistrophia
• †Amphoracrinus
• †Amplexiphyllum
  • †Amplexiphyllum cruciforme
  • †Amplexiphyllum simplex – tentative report
  • †Amplexiphyllum tenue
• †Amplexizaphrentis
  • †Amplexizaphrentis spinulosus

• 

  †Amplexopora
  • †Amplexopora discoidea – or unidentified comparable form
• †Amplexus
• †Anachoropteris
  • †Anachoropteris involuta
• †Anapiculatisporites
  • †Anapiculatisporites baccatus
  • †Anapiculatisporites spinosus
• †Anartiocystis
• †Anastrophia
  • †Anastrophia internascens
• †Anchiopsis
• †Ancyrocrinus
  • †Ancyrocrinus bulbosus
• †Anematina
  • †Anematina proutana – type locality for species
• †Angustidontus
  • †Angustidontus seriatus
• †Angyomphalus
  • †Angyomphalus northviewensis – or unidentified related form
• †Anisocrinus
  • †Anisocrinus laurelensis
• †Anisotrypa
  • †Anisotrypa solida
• †Ankyropteris
  • †Ankyropteris brongnartii

• 

  †Annularia
  • †Annularia mucronata
  • †Annularia radiata
  • †Annularia sphenophylloides
  • †Annularia stellata
• †Anomalodonta
  • †Anomalodonta gigantea
• †Anopliopsis
  • †Anopliopsis subcarinata
• †Anthracospirifer
  • †Anthracospirifer leidyi
• †Antirhynchonella
• †Aphelakardia
  • †Aphelakardia indianense
• †Aphelecrinus
  • †Aphelecrinus oweni
  • †Aphelecrinus randolphensis
• †Aphelotoxon
• †Aphlebia
  • †Aphlebia crispa
• †Apiculatasporites
  • †Apiculatasporites latigranifer
• †Apiculatisporites
  • †Apiculatisporites abditus
  • †Apiculatisporites lappites
  • †Apiculatisporites setulosus
• †Arabellites
  • †Arabellites comis
  • †Arabellites conspicuous – or unidentified comparable form
  • †Arabellites cultriformis – or unidentified comparable form
  • †Arabellites hamiltonesis
• †Arachnophyllum
  • †Arachnophyllum striatum – or unidentified comparable form
• †Archaeopitys
  • †Archaeopitys eastmanii

• 

  †Archimedes
  • †Archimedes communis
  • †Archimedes compactus
  • †Archimedes distans
  • †Archimedes intermedius
  • †Archimedes invaginatus
  • †Archimedes lativolvis
  • †Archimedes macfarlani
  • †Archimedes meekanoides
  • †Archimedes meekanus
  • †Archimedes negligens – or unidentified comparable form
  • †Archimedes proutanus
  • †Archimedes swallovanus
  • †Archimedes swallowvanus
  • †Archimedes symmetricus
  • †Archimedes terebriformis
• †Archinacella
  • †Archinacella indianensis – type locality for species

• 

  †Arctinurus
  • †Arctinurus boltoni
• †Arjamannia
  • †Arjamannia aulangonensis
• †Armenoceras
  • †Armenoceras madisonense
• †Arnoldella
  • †Arnoldella minuta
• †Arthroacantha
  • †Arthroacantha carpenteri
• †Arthropitys
  • †Arthropitys communis
• †Artisia
• †Asaphocrinus
  • †Asaphocrinus minor
• †Ascoceras
  • †Ascoceras newberryi
  • †Ascoceras wabashense
• †Ascodictyon
• †Ascopora
• †Aspidiaria
• †Asterophyllites
  • †Asterophyllites equisetiformis
  • †Asterophyllites grandis
• †Asterotheca
  • †Asterotheca crenulata
  • †Asterotheca cyathea
  • †Asterotheca hemitelliodes
  • †Asterotheca miltoni
  • †Asterotheca oreopteridia

• 

  †Asteroxylon
  • †Asteroxylon setchelli
• †Astraeospongium
• †Astylospongia
  • †Astylospongia praemorsa
• †Atactoporella
• †Atelodictyon
• †Athyris
  • †Athyris fultonensis
  • †Athyris lamellosa
  • †Athyris parvirostra
  • †Athyris spiriferoides
• †Atrypa
  • †Atrypa newsomensis
  • †Atrypa parva – or unidentified comparable form
  • †Atrypa reticularis
  • †Atrypa reticularus
• †Atrypina
  • †Atrypina disparilis
• †Aulacophyllum
  • †Aulacophyllum mutabile
  • †Aulacophyllum parvum
  • †Aulacophyllum perlamellosum
  • †Aulacophyllum pinnatum
  • †Aulacophyllum sulcatum
• †Aulacotheca
• †Aulocystis
  • †Aulocystis auloporidea
  • †Aulocystis incrustans – tentative report
  • †Aulocystis jacksoni
  • †Aulocystis lucasensis
  • †Aulocystis nobilis
  • †Aulocystis procumbens – tentative report
  • †Aulocystis transitorius – type locality for species

• 

  †Aulopora
  • †Aulopora edithana
  • †Aulopora microbuccinata
  • †Aulopora tubiporoides
• †Auloporella
• †Aviculopecten
  • †Aviculopecten colletti
  • †Aviculopecten invalidus
  • †Aviculopecten spinuliferus
  • †Aviculopecten terminalis
• † Avonia – tentative report
• † Avonia

• Bairdia
  • †Bairdia compacta
  • †Bairdia egorovi – or unidentified related form
  • †Bairdia kinderhookensis – or unidentified related form
• †Barroisella
  • †Barroisella campbelli
• †Barycrinus
  • †Barycrinus asperrimus
  • †Barycrinus asteriscus
  • †Barycrinus cornutus
  • †Barycrinus hoveyi
  • †Barycrinus stenobrachium
• †Baryschyr
  • †Baryschyr anosus
• †Batocrinus
  • †Batocrinus grandis
  • †Batocrinus isodactylus
• †Batostoma
  • †Batostoma prosseri
  • †Batostoma varians
• †Batostomella
• †Beatricea
  • †Beatricea undulata
• †Beecheria
  • †Beecheria illinoisense
  • †Beecheria shumardanum – tentative report
  • †Beecheria sinuata
• †Belemnospongia
  • †Belemnospongia fascicularis
  • †Belemnospongia parmula

• 

  †Bellerophon
  • †Bellerophon gibsoni – type locality for species
  • †Bellerophon jeffersonensis
  • †Bellerophon spergensis – type locality for species
• †Belodella
  • †Belodella resima – or unidentified comparable form
• †Beloitoceras
  • †Beloitoceras amoenum – type locality for species
  • †Beloitoceras bucheri
  • †Beloitoceras chapparsi
  • †Beloitoceras cumingsi
  • †Beloitoceras ohioense
  • †Beloitoceras transiens
• †Bembexia
  • †Bembexia minima
• Berenicea
• †Bethacanthus – type locality for genus
  • †Bethacanthus insolitus – type locality for species
• †Bethanyphyllum
  • †Bethanyphyllum arctifossa
  • †Bethanyphyllum depresstum
  • †Bethanyphyllum pocillum
  • †Bethanyphyllum robustum
  • †Bethanyphyllum validum
  • †Bethanyphyllum vesiculatum
• †Beyrichoceras
• †Bigalea
  • †Bigalea ohioensis – type locality for species
• †Billingsastrea
  • †Billingsastrea yandelli
• †Blothrophyllum
  • †Blothrophyllum bellicinctum
  • †Blothrophyllum corium
  • †Blothrophyllum greeni – tentative report
  • †Blothrophyllum romingeri – type locality for species
  • †Blothrophyllum sinuosum
  • †Blothrophyllum tripinnatum
  • †Blothrophyllum trisulcatum
  • †Blothrophyllum zaphrentiforme
• †Blountia – tentative report
• †Bordonia
  • †Bordonia knappi
• †Bothrodendron
  • †Bothrodendron minutifolium
• †Botryocrinus
  • †Botryocrinus nucleus
  • †Botryocrinus polyxo
• †Brachythyris
  • †Brachythyris fernglenensis – or unidentified related form
  • †Brachythyris suborbicularis
• †Brahmacrinus
  • †Brahmacrinus elongatus
• †Brittsia
  • †Brittsia problematica
• †Brockocystis
  • †Brockocystis nodosaria
• †Bucania
  • †Bucania simulatrix – type locality for species
• †Bucanophyllum
  • †Bucanophyllum ohioense
• †Bucanopsis
• †Bulimorpha
  • †Bulimorpha bulimiformis – type locality for species
  • †Bulimorpha elongata – type locality for species
• †Bullimorpha

• 

  †Bumastus
  • †Bumastus armatus – or unidentified comparable form
  • †Bumastus insignis
  • †Bumastus ioxus
  • †Bumastus niagarense – or unidentified comparable form
• †Bynumina
• †Byssonychia
  • †Byssonychia richmondensis
• †Bythocyproidea
• †Bythopora
  • †Bythopora delicatula
  • †Bythopora gracilis
  • †Bythopora meeki
  • †Bythopora striata

• 

  †Calamites
  • †Calamites cruciatus
  • †Calamites suckowii
• †Calamodendron
  • †Calamodendron americanum
• †Calamospora
  • †Calamospora breviradiata
  • †Calamospora flava
  • †Calamospora hartungiana
  • †Calamospora liquida
  • †Calamospora mutabilis
  • †Calamospora straminea
• †Calamostachys
  • †Calamostachys paniculata – tentative report
  • †Calamostachys superba
  • †Calamostachys tuberculata
• †Calceocrinus
• †Calliocrinus
  • †Calliocrinus beachleri
  • †Calliocrinus cornutus
• †Callipleura
  • †Callipleura nobilis

• 

  †Callipteridium
  • †Callipteridium sullivanti
• †Callistophyton
  • †Callistophyton boysettii
• †Callixylon
  • †Callixylon brownii
  • †Callixylon newberryi
• †Callocystites
  • †Callocystites brevis
• †Calocephalites
• †Calostylis
  • †Calostylis trigemma – tentative report
• †Calymene
  • †Calymene breviceps
  • †Calymene celebra

  • 

    †Calymene niagarensis
• †Calyptactis
  • †Calyptactis confragosus
• †Camarotoechia
  • †Camarotoechia gregaria – tentative report
  • †Camarotoechia horsfordi
  • †Camarotoechia mutata
  • †Camarotoechia neglecta – or unidentified comparable form
  • †Camarotoechia pisa
  • †Camarotoechia tethys
• †Camptocrinus
  • †Camptocrinus plenicirrus

• 

  †Carcinosoma
  • †Carcinosoma newlini
• †Cardiocarpon
  • †Cardiocarpon annulatum
  • †Cardiocarpon dilatatus
  • †Cardiocarpon ingens – tentative report
  • †Cardiocarpon latealatum
• †Carneyella
• †Carpocrinus
  • †Carpocrinus sculptus
• †Carpomanon
• †Caryocrinites
  • †Caryocrinites bulbulus
  • †Caryocrinites ellipticus
  • †Caryocrinites indianensis
  • †Caryocrinites laurelensis
  • †Caryocrinites sphaeroidalis
  • †Caryocrinites stellatus

• 

  †Caseodus
  • †Caseodus eatoni – type locality for species
• †Catazyga
  • †Catazyga headi
• †Catillocrinus
  • †Catillocrinus turbinatus
  • †Catillocrinus wachsmuthi
• †Cavellina
• †Cayrocrinites
• †Cayugaea
  • †Cayugaea subcylindrica
• †Cayugea
• †Centronella
  • †Centronella campbelli
  • †Centronella impressa
  • †Centronella navicella
• †Ceramopora
  • †Ceramopora imbricata
  • †Ceramopora vesicularis
• †Ceramoporella
  • †Ceramoporella ohioensis
• †Ceraurinus
  • †Ceraurinus icarus
• †Ceraurus
• †Cervifurca – type locality for genus
  • †Cervifurca nasuta – type locality for species
• †Chancelloria
• †Charactoceras
  • †Charactoceras baeri
  • †Charactoceras faberi
• †Cheilocephalus

• 

  †Cheirurus
  • †Cheirurus dilatatus
• †Chilotrypa
  • †Chilotrypa ostiolata
• †Chomatodus
• †Chondrites
• †Chonetes
  • †Chonetes geniculatus
  • †Chonetes yandellanus
• †Chonophyllum
  • †Chonophyllum nanum
• †Chonostegites
  • †Chonostegites clappi
  • †Chonostegites tabulatus
• †Cincinnaticrinus

• 

  †Cincinnetina
  • †Cincinnetina meeki
  • †Cincinnetina multisecta
• †Cingularia
• †Cingulizonates
  • †Cingulizonates loricatus
• †Cirratriradites
  • †Cirratriradites annulatus
  • †Cirratriradites annuliformis
• †Cladochonus
  • †Cladochonus beecheri
  • †Cladochonus crassus
  • †Cladochonus longi
• †Cladopora
  • †Cladopora acupicta
  • †Cladopora bifurca
  • †Cladopora gracilis – tentative report
  • †Cladopora gulielmi
  • †Cladopora imbricata – tentative report
  • †Cladopora robusta – tentative report
  • †Cladopora roemeri
• †Cladoxylon
• †Clathrodictyon
• †Clathrospira
  • †Clathrospira subconica
• †Cleiodictya
  • †Cleiodictya gloriosa

• 

  †Cleiothyridina
  • †Cleiothyridina hirsuta
  • †Cleiothyridina obmaxima
  • †Cleiothyridina parvirostra
  • †Cleiothyridina pravirostra
  • †Cleiothyridina sublamellosa
• †Cleodictya
• †Clepsidropsis
  • †Clepsidropsis titan
• †Clepsydropsis
  • †Clepsydropsis bertrandi
  • †Clepsydropsis chaneyi
• †Clinopistha
  • †Clinopistha exacutus
• †Cliotrypa
• †Clorinda – tentative report
• †Codonotheca
  • †Codonotheca caduca
• †Coelocerododontus
  • †Coelocerododontus biconvexus – or unidentified comparable form
• †Coelochilina
  • †Coelochilina striatomarginata
• †Coeloclema
• †Coelospira
• †Coenites
  • †Coenites brownsportensis
  • †Coenites cryptodens – or unidentified comparable form
  • †Coenites laqueata – or unidentified comparable form
  • †Coenites rectilineatus
• †Coleophyllum
  • †Coleophyllum romingeri
• †Columnaria
  • †Columnaria alveolata
  • †Columnaria vacua
• †Complexisporites
  • †Complexisporites chalonerii

• 

  †Composita
  • †Composita globosa
  • †Composita subquadrata
  • †Composita sulcata
  • †Composita trinuclea
• †Compressiphyllum
  • †Compressiphyllum davisana
• †Concavicaris
• †Conchidium
  • †Conchidium biolularis – or unidentified comparable form
  • †Conchidium exporrecta
  • †Conchidium laqueatum
  • †Conchidium littoni – or unidentified comparable form
• †Conocardium
  • †Conocardium richmondense – type locality for species

• 

  †Constellaria
  • †Constellaria limitaris
  • †Constellaria polystomella
• †Conularia
  • †Conularia formosa
• †Convolutipora
  • †Convolutipora florida
• †Convolutispora
  • †Convolutispora fromensis
• †Coolinia
  • †Coolinia subplana
• †Cordaianthus
  • †Cordaianthus gemmifer
• †Cordaicarpon – tentative report
• †Cordaites
  • †Cordaites borassifolius
  • †Cordaites crassinervis
  • †Cordaites principalis
• †Cornulitella

• 

  †Cornulites
  • †Cornulites formosa
  • †Cornulites proprius
• Cornuspira
  • †Cornuspira semiconstrictus
• †Coronura
  • †Coronura aspectans
• †Corynotrypa
  • †Corynotrypa dissimilis
• †Costalocrinus
  • †Costalocrinus rex
• †Costatulites
  • †Costatulites richmondensis
• †Cranaena
  • †Cranaena lincklaeni
  • †Cranaena romingeri
  • †Cranaena subcircularis
  • †Cranaena sulcata
  • †Cranaena sullivanti
• †Crania
  • †Crania chesterensis
• †Craniops
  • †Craniops hamiltonae
  • †Craniops hamiltoniae
• †Crassispora
  • †Crassispora kosankei
  • †Crassispora plicata
• †Craterophyllum
  • †Craterophyllum latiradium – tentative report
  • †Craterophyllum magnificum
• †Cribanocrinus
  • †Cribanocrinus coxanus
• †Cribroconcha – tentative report
• †Cristatisporites
  • †Cristatisporites alpernii
• †Crossotheca
  • †Crossotheca sagittata

• 

  †Crotalocrinites
• †Crotalocrinus
  • †Crotalocrinus cora
• †Crurithyris
  • †Crurithyris parva
• †Cryptonella
  • †Cryptonella lens
  • †Cryptonella ovalis
• †Crytobairdia
  • †Crytobairdia compacta
• †Ctenocrinus
  • †Ctenocrinus granulosus
• †Ctenodonta
  • †Ctenodonta iphegenia
  • †Ctenodonta madisonensis
• †Cuffeyella
  • †Cuffeyella arachnoidea
• †Cunctocrinus
  • †Cunctocrinus fortunatus
• †Cuneamya
  • †Cuneamya miamiensis
• †Cupularostrum
  • †Cupularostrum exima
• †Cupulocorona
  • †Cupulocorona gemmiformis
  • †Cupulocorona hammeli
  • †Cupulocorona osgoodensis
• †Cupulocrinus
  • †Cupulocrinus gemmiformis
• †Cyathaxonia
  • †Cyathaxonia cyndon
  • †Cyathaxonia tantilla

• 

  †Cyathocrinites
  • †Cyathocrinites glenni – or unidentified comparable form
  • †Cyathocrinites multibrachiatus
  • †Cyathocrinites parvibrachiatus
  • †Cyathocrinites pauli
  • †Cyathocrinites sanduskyensis
  • †Cyathocrinites striatissimus
  • †Cyathocrinites wilsoni
• †Cyathophyllum – tentative report
• †Cycloconcha
  • †Cycloconcha milleri
• †Cyclocyclopa
• †Cyclogranisporites
  • †Cyclogranisporites aureus
  • †Cyclogranisporites breviradiatus
  • †Cyclogranisporites microgranus
  • †Cyclogranisporites minutus
  • †Cyclogranisporites obliquus
  • †Cyclogranisporites orbicularis
  • †Cyclogranisporites staplini
• †Cycloholcus
• †Cyclonema
  • †Cyclonema bilix
  • †Cyclonema daytonensis
  • †Cyclonema gyronemoides
  • †Cyclonema type locality for species – informal
• †Cyclopentagonopa

• 

  †Cyclopteris
  • †Cyclopteris orbicularis
  • †Cyclopteris trichomanoides
• †Cyclospongia
  • †Cyclospongia discus
• †Cyclotrypa
• †Cylicocrinus
  • †Cylicocrinus canaliculatus
  • †Cylicocrinus indianensis
  • †Cylicocrinus spinosus
• †Cylindrophyllum
  • †Cylindrophyllum compactum
• †Cymatonota
  • †Cymatonota recta
  • †Cymatonota suberecta

• 

  †Cyphaspis
  • †Cyphaspis christyi
• †Cyphocrinus
  • †Cyphocrinus gorbyi
• †Cyphotrypa
  • †Cyphotrypa osgoodensis
• †Cypricardinia
  • †Cypricardinia indenta
  • †Cypricardinia scitula
• †Cyrtia
  • †Cyrtia exporrecta
• †Cyrtina
  • †Cyrtina burlingtonensis
  • †Cyrtina hamiltonensis
• †Cyrtocerina
  • †Cyrtocerina carinifera
  • †Cyrtocerina madisonensis
  • †Cyrtocerina modesta
  • †Cyrtocerina patella
• †Cyrtodontula
  • †Cyrtodontula sterlingensis
• †Cyrtolites
  • †Cyrtolites hornyi
  • †Cyrtolites ornatus
  • †Cyrtolites sinuosus

• 

  †Cyrtospirifer
  • †Cyrtospirifer latior
• †Cystelasma
• †Cystihalysites
  • †Cystihalysites magnituba
• †Cystiphylloides
  • †Cystiphylloides americanum
  • †Cystiphylloides cicatriciferum
  • †Cystiphylloides hispidum
  • †Cystiphylloides infundibuliformis
  • †Cystiphylloides nanum
  • †Cystiphylloides plicatum
  • †Cystiphylloides pustulatum
  • †Cystiphylloides quadrangulare
  • †Cystiphylloides squamosum
  • †Cystiphylloides tenuiradium
• †Cystiphyllum
• †Cystodictya
  • †Cystodictya lineata
• †Cytocrinus

• †Dalejina
  • †Dalejina euorthis
  • †Dalejina hybrida
  • †Dalejina newsomensis

• 

  †Dalmanites
  • †Dalmanites halli
  • †Dalmanites limulurus
• †Danaea
  • †Danaea meccaensis
• †Dawsonoceras
  • †Dawsonoceras americanum
  • †Dawsonoceras annulatum
• †Decadocrinus
  • †Decadocrinus depressus
  • †Decadocrinus stellatus – type locality for species
• †Decadorinus
• †Decaschisma
  • †Decaschisma pulchellum
• †Decatocrinus
• †Deceptrix
  • †Deceptrix albertina
  • †Deceptrix decipiens – tentative report
• †Dechenella
  • †Dechenella boteroi
  • †Dechenella lucasensis
• †Decoroproetus
• †Delicaster
  • †Delicaster enigmaticus
• †Dellea
• †Delthyris
  • †Delthyris clarksvillensis
• †Deltoidospora
  • †Deltoidospora grandis
  • †Deltoidospora sphaerotriangula
• †Dendrina – tentative report
• †Dendrocrinus
• †Densosporites
  • †Densosporites annulatus
  • †Densosporites irregularis
  • †Densosporites sphaerotriangularis
  • †Densosporites spinifer
  • †Densosporites triangularis
• †Desmacriocrinus
  • †Desmacriocrinus moreyi
• †Desmidocrinus
  • †Desmidocrinus dubius
  • †Desmidocrinus laurelianus
• †Devonochonetes
  • †Devonochonetes coronatus
  • †Devonochonetes fragilis
  • †Devonochonetes fragilus
  • †Devonochonetes scitulus
• †Diabolirhynchia
  • †Diabolirhynchia acinus
• †Diabolorhynchia
  • †Diabolorhynchia acinus
• †Diaphorodendron
• †Diaphragmus
  • †Diaphragmus fasciculatus
• †Dichocrinus
  • †Dichocrinus ficus
  • †Dichocrinus simplex
  • †Dichocrinus striatus
  • †Dichocrinus ulrichi
• †Dichostreblocrinus – type locality for genus
  • †Dichostreblocrinus scrobiculus – type locality for species
• †Dicksonites – tentative report
  • †Dicksonites pluckeneti
• †Dicoelosia
  • †Dicoelosia bilobata
• †Diconularia
• †Dictyoclostus
  • †Dictyoclostus inflatus
• †Dictyonema
• †Dictyospongia – tentative report
• †Diedrorynchus
  • †Diedrorynchus conalatum
• †Dielasma
  • †Dielasma arkansana
  • †Dielasma crawfordsvillensis
  • †Dielasma crowfordsvillensis
  • †Dielasma illinoisense
• †Dielasmella
  • †Dielasmella compressa
• †Diestoceras
  • †Diestoceras cyrtocerinoides
  • †Diestoceras eos
  • †Diestoceras indianense
  • †Diestoceras pupa
  • †Diestoceras reversum – tentative report
  • †Diestoceras shideleri
  • †Diestoceras shiderleri
  • †Diestoceras vasiforme
  • †Diestoceras waynesvillense – type locality for species
• †Dimegelasma
• †Dimerocrinites
  • †Dimerocrinites carleyi
  • †Dimerocrinites inornatus
  • †Dimerocrinites occidentalis

• 

  †Dinicthys
• †Dinobolus
  • †Dinobolus conradi – or unidentified comparable form
• †Diplochone
  • †Diplochone greenei
• †Diplothmema
  • †Diplothmema obtusiloba
• †Diplotrypa
  • †Diplotrypa nummiformis
• †Disphyllum
  • †Disphyllum cohaerens
  • †Disphyllum synaptophylloides – type locality for species
• †Ditoecholasma
  • †Ditoecholasma acutiannulatum

• 

  †Dizygocrinus
  • †Dizygocrinus indianaensis
  • †Dizygocrinus indianensis
  • †Dizygocrinus venustus – or unidentified comparable form
  • †Dizygocrinus whitei – or unidentified comparable form
• †Dolatocrinus
  • †Dolatocrinus bellarugosus
  • †Dolatocrinus bulbaceus
  • †Dolatocrinus corporosus
  • †Dolatocrinus greeni
• †Dolerorthis
  • †Dolerorthis flabellites
  • †Dolerorthis interplicata
• †Dorycrinus
  • †Dorycrinus gouldi
• †Douvillina
  • †Douvillina inaequistriata
• †Drabia – tentative report

• 

  †Drepanopterus
• †Drymopora
  • †Drymopora fascicularis
  • †Drymopora frutectosa
  • †Drymopora jacksoni
  • †Drymopora procumbens
• †Duncanella
  • †Duncanella borealis
• †Dyscritella
• †Dystactospongia
  • †Dystactospongia madisonensis

• †Ecclimadictyon
  • †Ecclimadictyon fastigiatum – or unidentified comparable form
• †Echinoconchus
  • †Echinoconchus alternatus
  • †Echinoconchus biseriatus
• †Edaphophyllum
  • †Edaphophyllum bifurcatum
  • †Edaphophyllum bipartitum

• 

  †Edestus
  • †Edestus heinrichi
• †Edmondia
  • †Edmondia varsoviensis
• †Elasmonema
  • †Elasmonema bellatula
• †Elaterites
  • †Elaterites triferens
• †Eldredgeops
  • †Eldredgeops rana
• †Elita
  • †Elita fimbriata
• †Elvinia
• †Elytron
  • †Elytron elimatus
• †Emmonsia
  • †Emmonsia amplissima
  • †Emmonsia bacula
  • †Emmonsia convexa
  • †Emmonsia cymosa
  • †Emmonsia emmonsi
  • †Emmonsia epidermata
  • †Emmonsia eximia
  • †Emmonsia radiciformis
  • †Emmonsia ramosa
  • †Emmonsia tuberosa
• †Emperocrinus
  • †Emperocrinus indianensis

• 

  †Encrinurus
  • †Encrinurus indianaensis
• †Endosporites
  • †Endosporites globiformis
  • †Endosporites plicatus
• †Enterolasma
  • †Enterolasma caliculum
• †Eocaudia
• Eocaudina
  • †Eocaudina marginata
  • †Eocaudina mccormacki
• †Eochonetes
  • †Eochonetes clarksvillensis
• †Eodictyonella (formerly Dictyonella)
  • †Eodictyonella coralifera – or unidentified comparable form
  • †Eodictyonella reticulata
• †Eohalysiocrinus
  • †Eohalysiocrinus stigmatus
• †Eoparisocrinus
  • †Eoparisocrinus siluricus
• †Eoplectodonta
  • †Eoplectodonta prolongatus
  • †Eoplectodonta transversalis
• †Eoplicanoplia
• †Eospinatrypa
  • †Eospinatrypa nodostriata
• †Eospirifer
  • †Eospirifer eudora
  • †Eospirifer foggi
  • †Eospirifer niagarensis
  • †Eospirifer radiatus
• †Eotomaria
  • †Eotomaria laphami
  • †Eotomaria trochoides – type locality for species
• †Eotrochus
  • †Eotrochus tenuimarginatus – type locality for species
• †Eratocrinus
  • †Eratocrinus salemensis

• 

  †Eretmocrinus
  • †Eretmocrinus cassedayanus – tentative report
  • †Eretmocrinus magnificus
• †Eridophyllum
  • †Eridophyllum apertum
  • †Eridophyllum archiaci
  • †Eridophyllum coagulatum
  • †Eridophyllum conjunctum
  • †Eridophyllum seriale
• †Eridopora
  • †Eridopora macrostoma
• †Eridorthis
  • †Eridorthis nicklesi

• 

  †Erieopterus
  • †Erieopterus limuloides
• †Eucalyptocrinites
  • †Eucalyptocrinites caelatus
  • †Eucalyptocrinites crassus
  • †Eucalyptocrinites tuberculatus
• †Eucheirocrinus
  • †Eucheirocrinus indianensis
• †Euchondria
  • †Euchondria grandis – tentative report
• †Euconospira
  • †Euconospira conula – type locality for species
  • †Euconospira elegantula – type locality for species
• †Eugeneodus – type locality for genus
  • †Eugeneodus richardsoni – type locality for species
• †Eumetria
  • †Eumetria costata
  • †Eumetria marcyi
  • †Eumetria vera
  • †Eumetria verneuiliana
  • †Eumetria verneuliana
• †Eunella
  • †Eunella harmonia
• †Eunema
  • †Eunema helicteres
• †Eunicites
• †Euomphalopterus
  • †Euomphalopterus alatus
• †Eupachycrinus
  • †Eupachycrinus boydii
• †Eurychilina
  • †Eurychilina striatomarginata
• †Eusphenopteris
• †Euthyrhachis
  • †Euthyrhachis indianense
• †Eutrophoceras

• †Fabalicypris
• †Fardenia
  • †Fardenia subplana

• 

  †Favosites
  • †Favosites arbor
  • †Favosites baculus
  • †Favosites biloculi
  • †Favosites clelandi
  • †Favosites cristatus
  • †Favosites discoideus
  • †Favosites favosus
  • †Favosites forbesi
  • †Favosites forbsei
  • †Favosites goodwini
  • †Favosites hisingeri
  • †Favosites hispidus – or unidentified comparable form
  • †Favosites impeditus
  • †Favosites mundus
  • †Favosites niagarensis
  • †Favosites occidentalis
  • †Favosites patellatus – type locality for species
  • †Favosites pirum
  • †Favosites placentus
  • †Favosites proximatus
  • †Favosites quercus
  • †Favosites ramulosus
  • †Favosites rotundituba
  • †Favosites spinigerus
  • †Favosites turbinatus
• †Fayettoceras
  • †Fayettoceras thompsoni

• 

  †Fenestella
  • †Fenestella burlingtonensis
  • †Fenestella cestriensis
  • †Fenestella exigua
  • †Fenestella matheri
• †Fenestralia
• †Ferganella
• †Fimbrispirifer
  • †Fimbrispirifer divaricatus
  • †Fimbrispirifer venustus
• †Finitiporus
  • †Finitiporus boardmani
• †Fistulipora
  • †Fistulipora compressa
  • †Fistulipora compressus
  • †Fistulipora excellens
  • †Fistulipora incrustans
  • †Fistulipora perdensa
  • †Fistulipora promiscua
  • †Fistulipora spergenensis
• †Fletcheria
• †Flexaria
  • †Flexaria annosa – or unidentified related form
  • †Flexaria floydensis

• 

  †Flexicalymene
  • †Flexicalymene meeki
• †Florinites
  • †Florinites antiquus
  • †Florinites millotti
  • †Florinites similis
  • †Florinites visendus
  • †Florinites volans
• †Floweria
  • †Floweria chemungensis

• †Gattendorfia
  • †Gattendorfia alteri – type locality for species
• †Gazacrinus
  • †Gazacrinus depressus
  • †Gazacrinus inornatus
  • †Gazacrinus magnus
  • †Gazacrinus ventricosus
• †Gennaeocrinus
  • †Gennaeocrinus carinatus
• †Gigantopteris
  • †Gigantopteris dawsoni

• 

  †Gilbertsocrinus
  • †Gilbertsocrinus tuberosus
• †Gilliodus
  • †Gilliodus orvillei – type locality for species
  • †Gilliodus peyeri – type locality for species
• †Girtyella
  • †Girtyella brevilobata
  • †Girtyella indianensis
• †Girtyspira
  • †Girtyspira canaliculata – type locality for species
• †Gissocrinus
• †Glabrocingulum

• 

  †Glikmanius
  • †Glikmanius occidentalis
• Glomospira
  • †Glomospira articulosa
• †Glyphodeta
  • †Glyphodeta terebriformis – type locality for species
• †Glyptambon
  • †Glyptambon verrucosus
• †Glyptaster
• †Glyptocrinus
• †Glyptodesma
• †Glyptopora
• †Glyptorthis
  • †Glyptorthis insculpta

• 

  †Gomphoceras
  • †Gomphoceras projectum
  • †Gomphoceras wabashense
• †Gomphocystites
  • †Gomphocystites indianensis
• †Gorbyoceras
  • †Gorbyoceras crossi
  • †Gorbyoceras duncanae
  • †Gorbyoceras gorbyi
  • †Gorbyoceras hammelli
• †Gosseletina
  • †Gosseletina subglobosa – type locality for species
• †Granasporites
  • †Granasporites medius
• †Granatocrinus
  • †Granatocrinus granulosus – tentative report
• †Granulatisporites
  • †Granulatisporites granularis
  • †Granulatisporites minutus
  • †Granulatisporites pallidus
  • †Granulatisporites parvus – or unidentified comparable form
  • †Granulatisporites tuberculatus
• †Graphiadactyllis
  • †Graphiadactyllis fayettevillensis
  • †Graphiadactyllis fernglenesis
  • †Graphiadactyllis granopunctatus
• †Graphiadactylloides
  • †Graphiadactylloides imopmemsos
  • †Graphiadactylloides lineatus – or unidentified related form
  • †Graphiadactylloides moridgei
  • †Graphiadactylloides unionensis
• †Graphiadactylus
• †Graphosterigma
  • †Graphosterigma grammodes
• †Graptodictya
• †Greenops
  • †Greenops chilmanae
  • †Greenops pleione

• 

  †Grewingkia
  • †Grewingkia canadensis
  • †Grewingkia rusticum
• †Griffithidella
  • †Griffithidella doris
  • †Griffithidella welleri
• †Gypidula
  • †Gypidula nucleus

• †Hadroblastus
• †Hadrophyllum
  • †Hadrophyllum nettelrothi
  • †Hadrophyllum orbignyi

• 

  †Hallopora
  • †Hallopora elegantula
  • †Hallopora subnodosa
• †Halysiocrinus
  • †Halysiocrinus tunicatus
• †Halysites
  • †Halysites catenularia
  • †Halysites labyrinthicus
  • †Halysites microporus
• †Hamburgia
• †Haplistion
  • †Haplistion armstrongi
• †Hapsiphyllum
  • †Hapsiphyllum cassedayi
• †Harpidella
  • †Harpidella christyi
• †Harpidium – tentative report
• †Healdia
• †Hebertella
  • †Hebertella alveata
  • †Hebertella occidentalis
  • †Hebertella sinuata
  • †Hebertella subjugata
• †Hedeina
  • †Hedeina eudora
• †Hederella
  • †Hederella alpenensis
  • †Hederella delicatula
  • †Hederella filiformis
  • †Hederella thedfordensis
• †Helicotoma
  • †Helicotoma marginata
• †Heliolites
  • †Heliolites megastoma

• 

  †Heliophyllum
  • †Heliophyllum agassizi
  • †Heliophyllum denticulatum
  • †Heliophyllum halli
  • †Heliophyllum incrassatum
  • †Heliophyllum latericrescens
  • †Heliophyllum venatum
  • †Heliophyllum verticale
• †Helodus
  • †Helodus incisus
• †Helopora
  • †Helopora inexpectata
• †Hemitrypa
• †Hennigopora
  • †Hennigopora apta
• †Heslerodus
  • †Heslerodus divergens
• †Hesperorthis
• †Heteralosia
  • †Heteralosia keokuk
• †Heterangium
• †Heterophrentis
  • †Heterophrentis annulata
  • †Heterophrentis cyathiformis
  • †Heterophrentis duplicata
  • †Heterophrentis inflata
  • †Heterophrentis irregularis
  • †Heterophrentis nitida – tentative report
  • †Heterophrentis ovalis
  • †Heterophrentis prolifica
  • †Heterophrentis rafinesqui
  • †Heterophrentis simplex
  • †Heterophrentis trisutura
• †Heterotrypa
  • †Heterotrypa microstigma
  • †Heterotrypa perplexa
  • †Heterotrypa prolifica
  • †Heterotrypa singularis
  • †Heterotrypa subramosa

• 

  †Hexagonaria
  • †Hexagonaria bella
  • †Hexagonaria cincta
  • †Hexagonaria curta
  • †Hexagonaria ovoidea
  • †Hexagonaria partita
  • †Hexagonaria ponderosa
  • †Hexagonaria prisma
• †Hexameroceras
  • †Hexameroceras cacabiforme
  • †Hexameroceras delphicolum
• †Hindella – tentative report
• †Hindia
• †Hippocardia
  • †Hippocardia ohioense
• †Hirneacrinus
  • †Hirneacrinus cupellaeformis – type locality for species
  • †Hirneacrinus perplanus – type locality for species
• †Hiscobeccus
  • †Hiscobeccus capax
• †Histocrinus
  • †Histocrinus coreyi
  • †Histocrinus grandis
  • †Histocrinus graphicus
• †Hizemodendron
  • †Hizemodendron serratum
• †Hoareicardia
  • †Hoareicardia cunea
• †Holcocrinus
  • †Holcocrinus nodobrachiatus
• †Holcospermum
• †Holocystites
  • †Holocystites abnormalis
  • †Holocystites abnormis
  • †Holocystites alternatus
  • †Holocystites clavus
  • †Holocystites faberi – or unidentified comparable form
  • †Holocystites ornatus
  • †Holocystites ovatus
  • †Holocystites parvulus
  • †Holocystites perlongus
  • †Holocystites scutellatus
  • †Holocystites spangleri
  • †Holocystites splendens

• 

  †Holopea
  • †Holopea ampla
• †Holtedahlina
  • †Holtedahlina sulcata
• †Homalophyllum
  • †Homalophyllum fusiformis
  • †Homalophyllum herzeri
  • †Homalophyllum ungulum
• †Homocrinus
• †Homoeospira
  • †Homoeospira evax
• †Homotrypa
  • †Homotrypa alta – or unidentified related form
  • †Homotrypa austini – or unidentified comparable form
  • †Homotrypa communis
  • †Homotrypa flabellaris
  • †Homotrypa gelasinosa
  • †Homotrypa nodulosa – or unidentified comparable form
  • †Homotrypa richmondensis
  • †Homotrypa wortheni
• †Homotrypella
• †Hondichnus
  • †Hondichnus monroensis
• †Hormotoma
  • †Hormotoma gracilis
• †Howellella
  • †Howellella crispa
  • †Howellella crispus
• †Hydnoangulus – type locality for genus
  • †Hydnoangulus quadratus – type locality for species
• †Hydriodictya – tentative report
  • †Hydriodictya cyclix
• †Hylodecrinus
  • †Hylodecrinus sculptus

†Hyolithes

• • †Hyolithes monroensis
• Hyperammina
  • †Hyperammina bulbosa
  • †Hyperammina casteri
  • †Hyperammina constricta
  • †Hyperammina gracilenta
  • †Hyperammina kentuckyensis
  • †Hyperammina rockfordensis
• †Hypergonia
  • †Hypergonia attenuata – type locality for species
  • †Hypergonia turritella – type locality for species
  • †Hypergonia vermicula – type locality for species
• †Hypselocrinus
  • †Hypselocrinus hoveyi
  • †Hypselocrinus indianensis

• †Ichthyorachis
• †Icriodus
  • †Icriodus latericrescens
• †Icthyocrinus
  • †Icthyocrinus corbis
  • †Icthyocrinus subangularis
• †Ildraites
  • †Ildraites howelli
• †Illaenoides
• †Illaenus
• †Imbrexia
  • †Imbrexia forbesi
  • †Imbrexia montgomeryensis
  • †Imbrexia mortonana
• †Imitoceras
  • †Imitoceras rotatorium
• †Iniopera – type locality for genus
  • †Iniopera richardsoni – type locality for species

• 

  †Iniopteryx
  • †Iniopteryx rushlaui
• †Inocaulis
• †Intrapora
  • †Intrapora irregularis
• †Iocrinus
• †Ischadites
  • †Ischadites subturbinatus
  • †Ischadites tenuis
• †Ischyrodonta
  • †Ischyrodonta decipiens
  • †Ischyrodonta ovalis
  • †Ischyrodonta truncata
• †Isobuthus
  • †Isobuthus pottsvillensis – type locality for species
• †Isochilina
  • †Isochilina subnodosa
• †Isorthis
  • †Isorthis arcuaria – or unidentified related form

• 

  †Isotelus
  • †Isotelus gigas
  • †Isotelus maximus

• †Kallimorphocrinus – type locality for genus
  • †Kallimorphocrinus astrus – type locality for species
• †Kalymma
  • †Kalymma lirata
• †Karinopteris
• †Kaskia
  • †Kaskia chesterensis
• †Kindbladia
• †Kindleoceras
  • †Kindleoceras cumingsi
  • †Kindleoceras equilaterale
  • †Kindleoceras rotundum
• †Kingstonia
• †Kionelasma
  • †Kionelasma coarticum
  • †Kionelasma conspicuum
  • †Kionelasma mammiferum

• 

  †Kionoceras
  • †Kionoceras bellense – or unidentified comparable form
  • †Kionoceras cancellatum
  • †Kionoceras delphiense
• †Kirkbya
  • †Kirkbya fernglenensis
  • †Kirkbya keiferi
• †Kirkbyella
  • †Kirkbyella annensis
• †Kirkidium
  • †Kirkidium knighti – or unidentified comparable form
  • †Kirkidium laqueatum
• †Knightites
• †Knoxina
• †Knoxisporites
  • †Knoxisporites rotatus
  • †Knoxisporites triradiatus
• †Kodonophyllum
  • †Kodonophyllum mulleri – or unidentified comparable form

• 

  †Kokomopterus
  • †Kokomopterus longicaudatus
• †Kosovopeltis

• †Labechia
• †Laevigatosporites
  • †Laevigatosporites desmoinensis
  • †Laevigatosporites desmoinesensis
  • †Laevigatosporites globosus
  • †Laevigatosporites medius
  • †Laevigatosporites minutus
  • †Laevigatosporites ovalis
  • †Laevigatosporites punctatus
  • †Laevigatosporites vulgaris
• †Lambeoceras
  • †Lambeoceras richmondense
• †Lampadosocrinus
  • †Lampadosocrinus minutus
• †Langepis
  • †Langepis campbelli – type locality for species
• †Laurelocrinus
  • †Laurelocrinus gibbosus
  • †Laurelocrinus paulensis
  • †Laurelocrinus spinoradialis
  • †Laurelocrinus wilsoni
• †Leangella
• †Lebedictya
  • †Lebedictya crinita
• †Lebetocrinus
  • †Lebetocrinus grandis
• †Lecanocrinus
  • †Lecanocrinus elongatus
  • †Lecanocrinus pusillus
• †Lechritochoceras
  • †Lechritochoceras desplainense
• †Lecythiocrinus – tentative report
• †Leiorhynchus
  • †Leiorhynchus limitare
  • †Leiorhynchus quadricostatum
• †Leiotriletes
  • †Leiotriletes adnatoides
  • †Leiotriletes levis
  • †Leiotriletes notatus
• †Leodicites
  • †Leodicites imparilis – or unidentified related form
  • †Leodicites variedentatus
• †Lepadocystis
• †Leperditia
  • †Leperditia caecigena
  • †Leperditia caecigenia
• †Lepetopsis
  • †Lepetopsis levettei – type locality for species
• †Lepidocarpon
• †Lepidocyclus
  • †Lepidocyclus perlamellosum

• 

  †Lepidodendron
  • †Lepidodendron aculeatum
  • †Lepidodendron baylense
  • †Lepidodendron dichotomum
  • †Lepidodendron hickii
  • †Lepidodendron lanceolatum – tentative report
  • †Lepidodendron latifolium
  • †Lepidodendron modulatum
  • †Lepidodendron obovatum
  • †Lepidodendron ophiurus
  • †Lepidodendron vestitum
  • †Lepidodendron wortheni
• †Lepidophloios
  • †Lepidophloios hallii
  • †Lepidophloios laricinus – or unidentified comparable form
• †Lepidophyllum
  • †Lepidophyllum longifolium
• †Lepidostrobophyllum
  • †Lepidostrobophyllum affine
  • †Lepidostrobophyllum ovatifolius
  • †Lepidostrobophyllum princeps – or unidentified comparable form
• †Lepidostrobus
  • †Lepidostrobus incertus – or unidentified comparable form
  • †Lepidostrobus variabilis
• †Leptaena
  • †Leptaena convexa
  • †Leptaena gibbosa
  • †Leptaena rhomboidalis
  • †Leptaena richmondensis
• †Leptoconocardium
  • †Leptoconocardium catastomum – type locality for species
• †Leptodesma
  • †Leptodesma rogersi
• †Leptotrypella
  • †Leptotrypella ohioensis
• †Lesueurilla
  • †Lesueurilla beloitensis
• †Lichas
  • †Lichas breviceps
• †Lichenalia
• †Liljevallospira
• †Limoptera

• 

  †Lingula
  • †Lingula otheri
  • †Lingula spatulata
• †Lingulops
• †Linoproductus
  • †Linoproductus altonensis
  • †Linoproductus pileiformis
• †Linopteris
• †Liospira
  • †Liospira micula
  • †Liospira obtusa
  • †Liospira vitruvia
• †Lissatrypa
• †Litocrinus
• †Llanoaspis – tentative report
• †Lobatopteris
  • †Lobatopteris vestita – or unidentified comparable form
• †Lobomelocrinus
  • †Lobomelocrinus obconicus
• †Lophoblastus
  • †Lophoblastus inopinatus – or unidentified comparable form
• †Lophospira
  • †Lophospira milleri
  • †Lophospira perangulata
  • †Lophospira serrulata
  • †Lophospira ventricosa
• †Lophotriletes
  • †Lophotriletes commissuralis
  • †Lophotriletes pseudaculeatus
  • †Lophotriletes rarispinosus
• †Loxonema
• †Lumbriconerites
• †Lumectaster
  • †Lumectaster howelli
• †Lunulazona – tentative report
  • †Lunulazona springeri
• †Lycospora
  • †Lycospora granulata
  • †Lycospora micropapillata
  • †Lycospora noctuina
  • †Lycospora orbicula
  • †Lycospora paulula
  • †Lycospora pellucida
  • †Lycospora punctata
  • †Lycospora pusilla
  • †Lycospora rotunda
  • †Lycospora subjuga
• †Lyginorachis
  • †Lyginorachis dineuroides
• †Lyriocrinus
  • †Lyriocrinus melissa
• †Lyrodesma
  • †Lyrodesma major
• †Lyropora
  • †Lyropora devonica
• †Lyroporella
  • †Lyroporella divergens
• †Lysocystites
  • †Lysocystites sculptus
• †Lytospira
  • †Lytospira undulatus

• †Macrocrinus
  • †Macrocrinus mundulus – tentative report
  • †Macrocrinus strotobasilaris
  • †Macrocrinus strotobasilarsis
• Macrocypris – tentative report
• †Macrostachya
  • †Macrostachya infundibuliformis
• †Macrostylocrinus
  • †Macrostylocrinus fasciatus
  • †Macrostylocrinus striatus
• †Manicrinus
  • †Manicrinus erectus
  • †Manicrinus hybocriniformis
• †Manitoulinoceras
  • †Manitoulinoceras erraticum
  • †Manitoulinoceras gyroforme
  • †Manitoulinoceras moderatum
• †Marginatia
  • †Marginatia burlingtonensis
  • †Marginatia crawfordsvillensis
• †Marginirugus
  • †Marginirugus magnus
• †Mariopteris
  • †Mariopteris hymenophylloides – tentative report
  • †Mariopteris mazoniana
  • †Mariopteris muricata
  • †Mariopteris nervosa
• †Marsupiocrinus
  • †Marsupiocrinus laurelensis
  • †Marsupiocrinus pauciornatus
  • †Marsupiocrinus turbinatus
• †Martinia
  • †Martinia contracta
• †Maurotarion
  • †Maurotarion christi
• †Mediospirifer
  • †Mediospirifer audaculus
• †Medullosa
• †Meekopora
  • †Meekopora eximia
• †Megakozlowskiella
  • †Megakozlowskiella sculptilis
• †Megalomphala
  • †Megalomphala crassa
• †Megalomus
  • †Megalomus canadensis
• †Megastrophia
  • †Megastrophia concava
  • †Megastrophia profunda
• †Megistocrinus
  • †Megistocrinus expansus
• †Melocrinites
  • †Melocrinites aequalis
  • †Melocrinites oblongus
• †Melonechinus
• †Mendacella
  • †Mendacella circulus
• †Meniscophyllum
  • †Meniscophyllum minutum
• †Menoeidina
• †Merista
  • †Merista nitida

• 

  †Meristella
  • †Meristella nasuta
• †Meristina
  • †Meristina maria
  • †Meristina rectirostra
  • †Meristina rectirostris
• †Merocanites
• †Mesocyridira
  • †Mesocyridira bifurcata
  • †Mesocyridira flagrocosta
  • †Mesocyridira keokuk
  • †Mesocyridira pallaensis – or unidentified related form
  • †Mesocyridira pellaensis – or unidentified related form
  • †Mesocyridira washingtonensis
• †Mesoleptostrophia
• †Mesoneuron
  • †Mesoneuron simplex
• †Mesotrypa
• †Metriophyllum
  • †Metriophyllum deminutivum
• †Miamoceras
  • †Miamoceras shideleri
• †Michelinia
  • †Michelinia manucus
• †Microantyx
  • †Microantyx botoni – type locality for species
• †Microcheilinella
  • †Microcheilinella spinosa
• †Microplasma
• †Microreticulatisporites
  • †Microreticulatisporites nobilis
  • †Microreticulatisporites sulcatus
• †Mirocheilinella
• †Mixoneura – tentative report
  • †Mixoneura jenneyi
• †Modiolopsis
  • †Modiolopsis concentrica – tentative report
  • †Modiolopsis modiolaris
  • †Modiolopsis versaillesensis
• †Modiomorpha
  • †Modiomorpha concentrica
• †Monodechenella
  • †Monodechenella macrocephala
• †Monomorella
• †Monotrypa
  • †Monotrypa benjamini
  • †Monotrypa exserta
• †Monotrypella
  • †Monotrypella aequalis
• †Mooreisporites
  • †Mooreisporites inusitatus
• †Mooreoceras
  • †Mooreoceras chouteauense
  • †Mooreoceras indianense
• †Mourlonia
• †Mucophyllum

• 

  †Mucrospirifer
  • †Mucrospirifer mucronatus
  • †Mucrospirifer profundus
  • †Mucrospirifer prolificus
• †Muensteroceras
  • †Muensteroceras oweni
  • †Muensteroceras parallelum
• †Mulceodens
  • †Mulceodens jaanussoni – or unidentified comparable form
• †Murchisonia
  • †Murchisonia laphami
  • †Murchisonia subulata
  • †Murchisonia vincta – type locality for species
• †Murchisonida
• †Myalina
  • †Myalina keokuk
• †Myelodactylus
  • †Myelodactylus ammonis
  • †Myelodactylus convolutus
• †Mysticocrinus

• †Natica
  • †Natica littonana – type locality for species
• †Naticonema

• 

  †Naticopsis
  • †Naticopsis carleyana – type locality for species
  • †Naticopsis plebeia
• †Navispira
  • †Navispira kennethensis
• †Neilsonia
  • †Neilsonia insculpta – type locality for species
• †Nematopora
• †Neolageniocrinus
  • †Neolageniocrinus cassidus – type locality for species
• †Neopalaeaster
  • †Neopalaeaster crawfordsvillensis
• †Neozaphrentis
• †Nereidavis

• 

  †Neuropteris
  • †Neuropteris fimbriata
  • †Neuropteris flexuosa
  • †Neuropteris heterophylla
  • †Neuropteris macrophylla
  • †Neuropteris obliqua
  • †Neuropteris ovata
  • †Neuropteris rarinervis
  • †Neuropteris scheuchzeri
  • †Neuropteris tenuifolia
  • †Neuropteris violetta
• †Nicklesopora
• †Nikiforovella
• †Nipterocrinus
  • †Nipterocrinus monroensis
• †Nucleocrinus
  • †Nucleocrinus angularis
• †Nucleospira
  • †Nucleospira concentrica – or unidentified comparable form
  • †Nucleospira concinna
  • †Nucleospira pisiformis
  • †Nucleospira rowleyi – or unidentified related form
• †Nucularca
  • †Nucularca cingulata
• †Nuculites
• †Nuculopsis
  • †Nuculopsis hians

• †Odontophyllum
  • †Odontophyllum convergens

• 

  †Odontopleura – tentative report
• †Odontopteris
  • †Odontopteris subcuneata
• †Ohiocrinus
  • †Ohiocrinus brauni
• †Oligocarpia
  • †Oligocarpia missouriensis
• †Omospira
  • †Omospira alexandra – or unidentified comparable form
• †Omphalophloios^[1]
  • †Omphalophloios wagneri – type locality for species^[1]
• †Oncoceras
  • †Oncoceras anomalum
  • †Oncoceras duncanae
  • †Oncoceras exile
  • †Oncoceras insuetum
• †Onniella
  • †Onniella macerata
• †Onychaster
  • †Onychaster flexilis

• 

  †Onychocrinus
  • †Onychocrinus exculptus
  • †Onychocrinus exsculptus
  • †Onychocrinus pulaskiensis
  • †Onychocrinus ramulosus
• †Onychopterella
  • †Onychopterella kokomoensis
• †Oonoceras
  • †Oonoceras fennemani
  • †Oonoceras rejuvenatum
  • †Oonoceras shideleri
• †Ophiletina
  • †Ophiletina sublaxa
• †Opisthoptera
  • †Opisthoptera casei
• †Orbiculoidea
  • †Orbiculoidea keokuk
  • †Orbiculoidea lodiensis
• †Oriostoma
  • †Oriostoma globosum – or unidentified comparable form
  • †Oriostoma hoyi
• †Ornithoprion – type locality for genus
  • †Ornithoprion hertwigi – type locality for species

• 

  †Orodus
  • †Orodus greggi – type locality for species
  • †Orodus micropterygius – type locality for species
• †Orthis
  • †Orthis biforata
  • †Orthis pyramidalis
• †Orthodesma
  • †Orthodesma curvatum
• †Orthonybyoceras
  • †Orthonybyoceras dyeri
• †Orthonychia
  • †Orthonychia conicum
• †Orthopleura
• †Orthostrophia
  • †Orthostrophia fissistriata
• †Orthotetes
  • †Orthotetes kaskaskiensis
  • †Orthotetes keokuk
• †Ortonella
  • †Ortonella hainesi
• †Osgoodicystis
  • †Osgoodicystis biessetti
  • †Osgoodicystis cooperi
  • †Osgoodicystis wykoffi
• †Otarion
  • †Otarion niagarensis
• †Ovatia
  • †Ovatia ovata – tentative report
  • †Ovatia ovatus
• †Oxyprora
  • †Oxyprora carinatum – type locality for species

• †Pachydictya
  • †Pachydictya crassa
• †Pachylocrinus
  • †Pachylocrinus aequalis
  • †Pachylocrinus briareus
  • †Pachylocrinus gibsoni
• †Pachytesta
  • †Pachytesta vera – or unidentified comparable form
• †Palaeacis
  • †Palaeacis enormis
• †Palaeocapulus
  • †Palaeocapulus acutirostre
  • †Palaeocapulus equilateralis
• †Palaeoconcha
  • †Palaeoconcha faberi
• †Palaeoneilo
  • †Palaeoneilo sulcatina
  • †Palaeoneilo truncata
• †Palaeostachya
  • †Palaeostachya elongata
• †Paleofavosites – tentative report
  • †Paleofavosites prolificus
• †Paleospora
  • †Paleospora fragila
• †Paleostachya
• †Paliphyllum
  • †Paliphyllum suecicum brassfieldense
• †Palmatolepis
  • †Palmatolepis linguiformis
  • †Palmatolepis pseudofoliatus
  • †Palmatolepis timorenis
• †Palmatopteris
  • †Palmatopteris furcata
• †Paolia – type locality for genus
  • †Paolia vetusta – type locality for species
• †Paoliola
  • †Paoliola gurleyi – type locality for species
• †Paracolocrinus
  • †Paracolocrinus paradoxicus
• †Paraconularia
  • †Paraconularia chesterensis – tentative report
  • †Paraconularia crawfordsvillensis
• †Paracyclas
  • †Paracyclas occidentalis
  • †Paracyclas proavia
• †Paradichocrinus
  • †Paradichocrinus planus
  • †Paradichocrinus polydactylus
• †Paragazacrinus
  • †Paragazacrinus rotundus
• †Parallelodon
  • †Parallelodon obsoletus – tentative report
  • †Parallelodon tenuistriatus
• †Paralycopodites
  • †Paralycopodites brevifolius
• †Paraparchites

• 

  †Paraspirifer
  • †Paraspirifer acuminatus
• †Parazyga
  • †Parazyga hirsuta
• †Parichthyocrinus
  • †Parichthyocrinus crawfordsvillensis
  • †Parichthyocrinus meeki
• †Parisocrinus
  • †Parisocrinus crawfordsvillensis
• †Parvohallopora
  • †Parvohallopora ramosa
• †Passalocrinus
  • †Passalocrinus triangularis
• †Patelliocrinus
  • †Patelliocrinus indianensis
  • †Patelliocrinus laevis
  • †Patelliocrinus ornatus
  • †Patelliocrinus rugosus
• †Paulicystis
  • †Paulicystis densus
  • †Paulicystis sparsus
• †Paulocrinus
  • †Paulocrinus biturbinatus
• †Paupospira
  • †Paupospira bowdeni
  • †Paupospira moorei – type locality for species
  • †Paupospira tropidophora

• 

  †Pecopteris
  • †Pecopteris cisti
  • †Pecopteris clintoni
  • †Pecopteris miltonii
  • †Pecopteris polymorpha
  • †Pecopteris pseudovestita – tentative report
  • †Pecopteris serpillifolia – tentative report
  • †Pecopteris squamosa
• †Pelagiella
• †Pellecrinus
  • †Pellecrinus hexadactylus
• †Pemtremites
  • †Pemtremites patei
• †Penniretepora
• †Pennsylvanioxylon
  • †Pennsylvanioxylon nauertianum
• †Pentacystis
  • †Pentacystis gibsoni
  • †Pentacystis wykoffi
• †Pentagonia
  • †Pentagonia biplicata
• †Pentamerella
  • †Pentamerella arata
  • †Pentamerella pavilionensis
• †Pentameroceras
  • †Pentameroceras cumingsi
• †Pentamerus
  • †Pentamerus fornicata
  • †Pentamerus oblungus
• †Pentaramicrinus
  • †Pentaramicrinus bimagnaramus

• 

  †Pentremites
  • †Pentremites abruptus
  • †Pentremites angularis
  • †Pentremites buttsi
  • †Pentremites clavatus
  • †Pentremites conoideus
  • †Pentremites elegans
  • †Pentremites girtyi
  • †Pentremites halli
  • †Pentremites hambachi
  • †Pentremites maccalliei
  • †Pentremites okawensis
  • †Pentremites patei
  • †Pentremites platybasis
  • †Pentremites pyramidatus
  • †Pentremites pyriformis
  • †Pentremites robustus
  • †Pentremites springeri
  • †Pentremites symmetricus
  • †Pentremites tulilpaformis
  • †Pentremites tulipaformis
  • †Pentremites welleri
• †Pentremitidea – tentative report
  • †Pentremitidea approximata
• †Perditocardinia
  • †Perditocardinia dubia
• †Periastron
  • †Periastron perforatum
  • †Periastron reticulatum
• †Pericyclus
• †Periechocrinites

• 

  †Periechocrinus
  • †Periechocrinus umbrosus
• †Peronopora
  • †Peronopora decipiens
• †Petalocrinus
  • †Petalocrinus inferior
  • †Petalocrinus longus
• †Petigopora
• †Petrocrania
  • †Petrocrania scabiosa
• †Phacelocrinus
  • †Phacelocrinus longidactylus

• 

  †Phacops
• †Phaenopora
  • †Phaenopora ensiformis
• †Phaenoschisma
• †Phanocrinus
  • †Phanocrinus formosus
  • †Phanocrinus parvaramus
• †Phestia
• †Philhedra
  • †Philhedra crenistriata
  • †Philhedra laelia
  • †Philhedra stewarti
• †Phillipsia
  • †Phillipsia bufi
  • †Phillipsia bufo
• †Phimocrinus – report made of unidentified related form or using admittedly obsolete nomenclature
• †Pholadomorpha
  • †Pholadomorpha pholadiformis
• †Pholidops – report made of unidentified related form or using admittedly obsolete nomenclature
• †Pholidostrophia
  • †Pholidostrophia iowaensis
• †Phosphannulus
• †Phractopora
• †Phragmoceras
  • †Phragmoceras parvum
• †Phragmodictya
  • †Phragmodictya catilliforme
• †Phragmolites
  • †Phragmolites dyeri
  • †Phragmolites triangularis
• †Phymatophyllum
  • †Phymatophyllum multiplicatum
• †Physospongia
  • †Physospongia colletti
  • †Physospongia dawsoni
• †Pietzschia
  • †Pietzschia polyupsilon
• †Pinna
  • †Pinna subspatulata
• †Pinnularia
• †Pisocrinus
  • †Pisocrinus benedicti – or unidentified comparable form
  • †Pisocrinus campana
  • †Pisocrinus gemmiformis
  • †Pisocrinus gorbyi
  • †Pisocrinus quinquelobus

• 

  †Plaesiomys
  • †Plaesiomys subquadrata
  • †Plaesiomys subquatra
• †Planalvus – tentative report
  • †Planalvus densa
• †Plasmopora
  • †Plasmopora follis
• †Platyaxum
  • †Platyaxum alicornis
  • †Platyaxum foliatum
  • †Platyaxum orthosoleniskum
  • †Platyaxum undosum

• 

  †Platyceras
  • †Platyceras argo – tentative report
  • †Platyceras brownsportense
  • †Platyceras bucculentum
  • †Platyceras clintonensis
  • †Platyceras cornutum – or unidentified comparable form
  • †Platyceras crassum
  • †Platyceras daytonense
  • †Platyceras echinatum
  • †Platyceras erectum
  • †Platyceras lineatum
  • †Platyceras niagarense
  • †Platyceras niagarensis
  • †Platyceras plebium
• †Platycrinites
  • †Platycrinites bonoensis
  • †Platycrinites hemispericus
  • †Platycrinites hemisphericus
  • †Platycrinites nodostriatus
  • †Platycrinites saffordi
  • †Platycrinites safordi
• †Platycrinus
• †Platyrachella
  • †Platyrachella macbridei
  • †Platyrachella oweni

• 

  †Platystrophia
  • †Platystrophia acutilirata
  • †Platystrophia annieana
  • †Platystrophia attenuata
  • †Platystrophia biforata – or unidentified comparable form
  • †Platystrophia clarksvillensis
  • †Platystrophia cummingsi
  • †Platystrophia cypha
  • †Platystrophia daytonensis
  • †Platystrophia elkhornensis
  • †Platystrophia foerstei
  • †Platystrophia hopensis
  • †Platystrophia laticosta
  • †Platystrophia moritura
  • †Platystrophia ponderosa
• †Platyzona
  • †Platyzona trilineata – type locality for species
• †Pleapopleurus
  • †Pleapopleurus tenuicostatus
  • †Pleapopleurus tenuicostus
• †Pleapopluerus
  • †Pleapopluerus tenuicostatus – tentative report
• †Plectatrypa
• †Plectodonta
  • †Plectodonta elegantula
  • †Plectodonta transversalis
• †Plectorthis
  • †Plectorthis plicatella
• †Plectospira
  • †Plectospira sexplicata
• †Plectospirifer
• †Pleurocornu
  • †Pleurocornu amissum – or unidentified comparable form

• 

  †Pleurodictyum
  • †Pleurodictyum cornu
  • †Pleurodictyum cylindricum
  • †Pleurodictyum insigne
  • †Pleurodictyum maximum
  • †Pleurodictyum michelinoidea
  • †Pleurodictyum papillosa
  • †Pleurodictyum planum
  • †Pleurodictyum speciosus
  • †Pleurodictyum spiculata
  • †Pleurodictyum wardi
• †Pleuronotus
  • †Pleuronotus decewi
• †Pleurorthoceras
  • †Pleurorthoceras clarksvillense
• †Poleumita
  • †Poleumita scamnata

• 

  †Polygnathus
• †Polypora
  • †Polypora corticosa
  • †Polypora multispinosa
  • †Polypora nodolinearis
• †Polysacos – type locality for genus
  • †Polysacos vickersianum – type locality for species
• †Polytryphocycloides
• †Polyxylon
  • †Polyxylon elegans
• †Portlockiella
• †Poterioceras – tentative report
• †Poteriocrinites
  • †Poteriocrinites amplus – type locality for species
• †Potonieisporites
  • †Potonieisporites elegans
• †Prasopora
  • †Prasopora hospitalis
• Priscopedatus
• †Prismopora
  • †Prismopora serrulata
• †Pristiograptus
  • †Pristiograptus jaegeri
• †Probillingsites
• Proboscina
• †Prodromites
  • †Prodromites gorbyi
• †Productus
  • †Productus cestriensis
  • †Productus fasiculatus

• 

  †Proetus
  • †Proetus crassimarginatus
  • †Proetus folliceps
• †Prolecanites
  • †Prolecanites lyoni
• †Prolecythiocrinus
  • †Prolecythiocrinus problematicus
• †Promexyele
  • †Promexyele bairdi
  • †Promexyele peyeri – type locality for species
• †Propora
  • †Propora exigua
• †Prosolarium
  • †Prosolarium crenulata
• †Protaraea
  • †Protaraea richmondensis
• †Protatrypa
  • †Protatrypa marginalis
• †Proteonina
  • †Proteonina cumberlandiae
• †Protocalamites
  • †Protocalamites dorfii
• †Protocanites
• †Protochonetes – tentative report
• †Protokoinoceras
  • †Protokoinoceras medullare
• †Protolepidodendron
  • †Protolepidodendron microphyllum
• †Protoleptostrophia
  • †Protoleptostrophia perplana
• †Protomegastrophia
• †Protoniella
  • †Protoniella parva – or unidentified related form
• †Protophragmoceras
  • †Protophragmoceras hercules
• †Protosalvinia
  • †Protosalvinia rarenna
• Psammosphaera

• 

  †Psaronius
• †Pseudagnostus
• †Pseudastrorhiza
  • †Pseudastrorhiza conica
• †Pseudaviculopecten
  • †Pseudaviculopecten indianensis
• †Pseudoatrypa
  • †Pseudoatrypa devoniana
• †Pseudobythocypris
• †Pseudocolpomya
  • †Pseudocolpomya elongata
• †Pseudolingula
• †Pseudostrohiza
  • †Pseudostrohiza delicata
• †Pseudosyrinx
  • †Pseudosyrinx gigas
• †Pseudozygopleura
  • †Pseudozygopleura yandellana – type locality for species
• †Psiloconcha
  • †Psiloconcha grandis
• †Psilokirkbyella
  • †Psilokirkbyella ozarkensis

• 

  †Pteria
• †Pterinea
  • †Pterinea brisa
  • †Pterinea demissa
• †Pterinopecten
  • †Pterinopecten hermes
  • †Pterinopecten princeps
• †Pterocephalia
• †Pterotheca
  • †Pterotheca expansa
  • †Pterotheca intermedia – type locality for species
• †Pterotocrinus
  • †Pterotocrinus acutus
  • †Pterotocrinus armatus – or unidentified comparable form
  • †Pterotocrinus bifurcatus
  • †Pterotocrinus birfurcatus
  • †Pterotocrinus convexus
  • †Pterotocrinus depressus
  • †Pterotocrinus lingulaformis
  • †Pterotocrinus rugosus
  • †Pterotocrinus spatulatus

• 

  †Pterygotus
  • †Pterygotus ventricosus
• †Ptychocarpus
  • †Ptychocarpus unitus
• †Ptychopleurella
• †Ptylopora
• †Punctatisporites
  • †Punctatisporites decorus
  • †Punctatisporites flavus
  • †Punctatisporites glaber
  • †Punctatisporites incomptus
  • †Punctatisporites minutus
  • †Punctatisporites nahannensis
  • †Punctatisporites obesus
  • †Punctatisporites orbicularis
• †Punctatosporites
  • †Punctatosporites minutus
• †Punctospirifer
  • †Punctospirifer obtusus
  • †Punctospirifer transversus
• †Pustulocystis
  • †Pustulocystis ornatissimus
• †Pycnosaccus
  • †Pycnosaccus laurelensis

• †Quasillinites
  • †Quasillinites diversiformis
• †Quasillites – tentative report
• †Quassilites

• †Rafinesquina
  • †Rafinesquina alternata
  • †Rafinesquina ponderosa
• †Raistrickia
  • †Raistrickia breveminens
  • †Raistrickia carbondalensis
  • †Raistrickia crinita
  • †Raistrickia crocea
  • †Raistrickia lowellensis
  • †Raistrickia subcrinita
  • †Raistrickia superba
• †Raphistomina
  • †Raphistomina modesta – or unidentified comparable form
• †Rasmussenoceras
  • †Rasmussenoceras variable
• †Rectifenestella
  • †Rectifenestella tenax
• †Rectobaidia
  • †Rectobaidia fragosa – or unidentified related form
• †Reimannia
  • †Reimannia indianensis
• †Renalcis – tentative report
• †Renaultia
  • †Renaultia chaerophylloides
• Reophax
  • †Reophax lachrymosa
• †Resserella
  • †Resserella elegantula
  • †Resserella waldronensis
• †Reticulariina
  • †Reticulariina salemensis
  • †Reticulariina spinosa
• †Reticulatisporites
  • †Reticulatisporites polygonalis
  • †Reticulatisporites reticulatus
• †Reticulitriletes
  • †Reticulitriletes falsus
• †Reticulopteris
  • †Reticulopteris muensteri
• †Retispira
  • †Retispira textilis – type locality for species
• †Retoporina
  • †Retoporina striata
• †Retrorsirostra
  • †Retrorsirostra carleyi
• †Retzia
  • †Retzia raricosta
• †Rhabdocarpus
  • †Rhabdocarpus mamillatus
  • †Rhabdocarpus mansfieldi – or unidentified comparable form
  • †Rhabdocarpus multistriatus
• †Rhabdomeson
• †Rhadinichthys
• †Rhegmaphyllum – tentative report
  • †Rhegmaphyllum daytonensis
• †Rhineoderma
  • †Rhineoderma nodulostriata – type locality for species
  • †Rhineoderma wortheni – type locality for species
• †Rhinidictya
• †Rhipdomella
  • †Rhipdomella perminuta
• †Rhipidium
• †Rhipidomella
  • †Rhipidomella hybrida
  • †Rhipidomella missouriensis
  • †Rhipidomella penelope
  • †Rhipidomella perminuta
  • †Rhipidomella tenuicosta – or unidentified comparable form
  • †Rhipidomella vanuxemi
• †Rhipidothyris
• †Rhombopora
  • †Rhombopora simplex
• †Rhombotrypa
  • †Rhombotrypa quadrata

• 

  †Rhynchonella
  • †Rhynchonella gainesi
  • †Rhynchonella scobina
  • †Rhynchonella tenuistriata
• †Rhynchopora
  • †Rhynchopora beecheri
  • †Rhynchopora perryensis – tentative report
  • †Rhynchopora rowleyi – tentative report
• †Rhynchotrema
  • †Rhynchotrema denatum
  • †Rhynchotrema dentatum
• †Rhynchotreta
  • †Rhynchotreta americana
• †Rhysocamax
  • †Rhysocamax grandis
• †Rhytimya
  • †Rhytimya byrnesis
  • †Rhytimya mickleboroughi
• †Richmondoceras – type locality for genus
  • †Richmondoceras brevicameratum – type locality for species
• †Rineceras
  • †Rineceras digonum – tentative report
• †Romingerella
  • †Romingerella major – or unidentified comparable form
• †Romingeria
  • †Romingeria commutata
  • †Romingeria fasciculata
  • †Romingeria umbellifera
  • †Romingeria uva
• †Ropalonaria
• † Rota
• †Rotiphyllum
  • †Rotiphyllum calyculum
• †Roundyella
  • †Roundyella mopacifa
• †Rugomena
  • †Rugomena vetusta
• †Rugosochonetes
  • †Rugosochonetes illinoisensis
  • †Rugosochonetes planumbona

• †Saccocrinus
  • †Saccocrinus benedicti
  • †Saccocrinus christyi
• †Saccosompsis
  • †Saccosompsis poterium
• †Saffordotaxis
• †Salpingostoma
  • †Salpingostoma buelli
  • †Salpingostoma richmondense
• †Samaropsis
  • †Samaropsis crampii – or unidentified comparable form
• †Sandalodus
• †Sanguinolites
  • †Sanguinolites herricki – tentative report
  • †Sanguinolites tropidophorus
• †Sapphicorhynchus
  • †Sapphicorhynchus sappho
• †Sarocrinus
  • †Sarocrinus nitidus
• †Savitrisporites
  • †Savitrisporites nux
• †Scalarituba
  • †Scalarituba missouriensis
• †Scalites
  • †Scalites richmondensis
• †Scenophyllum
  • †Scenophyllum conigerum
• †Schellwienella
  • †Schellwienella ulrichi
• †Schizobolus
  • †Schizobolus concentricus
• †Schizonema – tentative report
• †Schizophoria
• †Schlotheimophyllum
  • †Schlotheimophyllum typicum
• †Schoenaster
  • †Schoenaster fimbriatus
• †Schopfites
  • †Schopfites colchesterensis
  • †Schopfites dimorphus
• †Schuchertella
  • †Schuchertella costatula
  • †Schuchertella lens – tentative report
  • †Schuchertella subplana
• †Schuchertoceras
  • †Schuchertoceras geniculatum
  • †Schuchertoceras prolongatum
  • †Schuchertoceras rotundum
• †Schulzospora
  • †Schulzospora rara

• 

  †Scytalocrinus
  • †Scytalocrinus decadactylus
  • †Scytalocrinus disparilis – or unidentified comparable form
  • †Scytalocrinus robustus
• †Senftenbergia
  • †Senftenbergia pennaeformis
• †Septopora
  • †Septopora cestriensis
  • †Septopora subquadrans
• †Serpulopsis
  • †Serpulopsis jacobschapelensis
• †Serpulospira
  • †Serpulospira planispira
• †Setigerites
  • †Setigerites setiger
  • †Setigerites setigerus
• †Shideleroceras
  • †Shideleroceras gracile
• †Shivaella
  • †Shivaella nicklesi
• †Sibyrhynchus – type locality for genus
  • †Sibyrhynchus denisoni – type locality for species
• †Siderella
  • †Siderella scotti
• †Sidetes
• †Sievertsia

• 

  †Sigillaria
  • †Sigillaria brardii
  • †Sigillaria davreuxi
  • †Sigillaria kidstoni – tentative report
  • †Sigillaria mamillaris – or unidentified comparable form
  • †Sigillaria monostigma
  • †Sigillaria scutellata
• †Sigillariostrobus
  • †Sigillariostrobus quadrangularis
• †Silenites
  • †Silenites warei – or unidentified comparable form
• †Sinochonetes
  • †Sinochonetes lepidus
• †Sinuites
  • †Sinuites cancellatus
  • †Sinuites subcompressa
• †Sinuitina
• †Siphonophrentis
  • †Siphonophrentis elongata
  • †Siphonophrentis planima
  • †Siphonophrentis yandelli
• †Skelidorygma
  • †Skelidorygma subcardiiformis
• †Skenidioides
• Sorosphaera – tentative report
• †Sowerbyella
  • †Sowerbyella rugosa
• †Spackmanites
  • †Spackmanites facierugosus – or unidentified comparable form
  • †Spackmanites habibii
• †Spathella
  • †Spathella illinoiensis
• †Spathiocaris
• †Spathognathodus
  • †Spathognathodus snadjri – or unidentified comparable form
• †Spatiopora
• †Sphaerexochus
  • †Sphaerexochus romingeri
• †Sphaerirhynchia
  • †Sphaerirhynchia stricklandi
• †Sphaerocodium
• †Sphaerocyclus – report made of unidentified related form or using admittedly obsolete nomenclature
  • †Sphaerocyclus tuber
• †Sphenophyllostachys

• 

  †Sphenophyllum
  • †Sphenophyllum cuneifolium
  • †Sphenophyllum emarginatum
  • †Sphenophyllum hauchecornei
  • †Sphenophyllum myriophyllum
  • †Sphenophyllum plurifoliatum
• †Sphenopteris
  • †Sphenopteris broadheadi
  • †Sphenopteris shatzlarensis
• †Sphenosphaera
  • †Sphenosphaera mohri
  • †Sphenosphaera subangularis – type locality for species
• †Spinocyrtia
  • †Spinocyrtia euryteines
• †Spinozonotriletes
• †Spinulicosta
  • †Spinulicosta spinulicosta
• †Spinyplatyceras
  • †Spinyplatyceras milleri

• 

  †Spirifer
  • †Spirifer angusta
  • †Spirifer bifurcatus
  • †Spirifer byrnesi
  • †Spirifer crawfordsvillensis
  • †Spirifer floydensis – tentative report
  • †Spirifer fornaculus
  • †Spirifer increbescens
  • †Spirifer keokuk
  • †Spirifer macrus
  • †Spirifer montgomeryensis
  • †Spirifer mundulus – or unidentified comparable form
  • †Spirifer pellaensis – tentative report
  • †Spirifer rostellatus
  • †Spirifer shepardi – or unidentified related form
  • †Spirifer shephardi – or unidentified related form
  • †Spirifer tenuicostatus
  • †Spirifer tenuimarginatus
  • †Spirifer varicosus
  • †Spirifer veronensis – or unidentified comparable form
  • †Spirifer washingtonensis
• Spiropteris

• 

  Spirorbis
• †Spiroscala
• †Sporangites
  • †Sporangites huronensis
• †Springericrinus
  • †Springericrinus doris – tentative report
  • †Springericrinus magniventrus – tentative report
• †Spyroceras
  • †Spyroceras nuntium
• †Stacheia
  • †Stacheia cicatrix
  • †Stacheia trepeilopsiformis
• †Staurocephalus
• †Stegerhynchus
  • †Stegerhynchus indianense
  • †Stegerhynchus indianensis
  • †Stegerhynchus neglectum – or unidentified comparable form
  • †Stegerhynchus neglectus
  • †Stegerhynchus whitii
• †Stelastellara
  • †Stelastellara parvula
• †Stelliporella
  • †Stelliporella lamellata – or unidentified comparable form
• †Stenoloron
  • †Stenoloron swallovana – type locality for species
• †Stenopareia
• †Stenoscisma
  • †Stenoscisma explanatum
• †Stephanocrinus
  • †Stephanocrinus cornetti
  • †Stephanocrinus elongatus
  • †Stephanocrinus gemmiformis
  • †Stephanocrinus obpyramidalis
  • †Stephanocrinus quinquepartitus
• †Stereolasma
  • †Stereolasma exile – tentative report
  • †Stereolasma parvulum
• †Stethacanthulus – type locality for genus
  • †Stethacanthulus longipeniculus – type locality for species
  • †Stethacanthulus meccaensis

• 

  †Stethacanthus
  • †Stethacanthus altonensis
  • †Stethacanthus longipeniculus – type locality for species
• †Stictoporina
  • †Stictoporina granulifera
• †Stigmaria
  • †Stigmaria ficoides
  • †Stigmaria wedingtonensis
• †Stigmatella
  • †Stigmatella dubia
• †Stinocrinus
• †Stiptocrinus
  • †Stiptocrinus benedicti
  • †Stiptocrinus howardi
  • †Stiptocrinus ornatus
• Stomatopora
• †Straparollus
  • †Straparollus planodiscus
  • †Straparollus quadrivolvis – type locality for species
  • †Straparollus spergenensis – type locality for species
• †Streblotrypa
• †Streblotrypella
• †Streptelasma
  • †Streptelasma divaricans
  • †Streptelasma vagans
• †Striatopora
  • †Striatopora alba – tentative report
  • †Striatopora bellistriata
  • †Striatopora cavernosa
  • †Striatopora flexuosa
• †Stricklandia – tentative report
• †Striispirifer
• †Stromatopora
  • †Stromatopora antiqua
• †Stropeodonta
• †Stropheodonta
  • †Stropheodonta demissa
• †Strophochonetes
  • †Strophochonetes novascotica
• †Strophodonta
  • †Strophodonta demissa

• 

  †Strophomena
  • †Strophomena concordensis
  • †Strophomena erratica
  • †Strophomena extenuata
  • †Strophomena fissicosta
  • †Strophomena inequistriata
  • †Strophomena neglecta
  • †Strophomena nutans
  • †Strophomena planoconvexa
  • †Strophomena planumbona
  • †Strophomena scottensis
  • †Strophomena sulcata
  • †Strophomena vestusta
• †Strophonella
  • †Strophonella semifasciata
  • †Strophonella williamsi
• †Strophostylus
  • †Strophostylus cyclostomus
• †Styliolina
• †Stylolina
• †Subglobosochonetes
• †Sulcatina
  • †Sulcatina sulcata
• †Sulcoretepora
• †Sumixam – type locality for genus
  • †Sumixam maximus – type locality for species
• †Sutcliffia
  • †Sutcliffia insignis
• †Synbathocrinus
  • †Synbathocrinus swallovi
  • †Synbathocrinus swallowvi
• †Synchysidendron
  • †Synchysidendron resinosum

• 

  †Syringopora
  • †Syringopora hisingeri
  • †Syringopora monroensis
  • †Syringopora perelegans
• †Syringoporida
• †Syringothyris
  • †Syringothyris subcuspidatus – or unidentified comparable form
  • †Syringothyris textus

• †Tabulipora
  • †Tabulipora cestriensis
  • †Tabulipora ramosa
• †Taeniodictya
• †Tamiobatis
  • †Tamiobatis springeri
• †Tasmanites

• 

  †Taxocrinus
  • †Taxocrinus colletti
  • †Taxocrinus ungula – tentative report
• †Tentaculites
  • †Tentaculites gracilistriatus
  • †Tentaculites sterlingensis
• †Tetradium
  • †Tetradium huronense
• †Tetranota
  • †Tetranota wisconsinensis
• †Tetrasacculus
  • †Tetrasacculus stewarte – tentative report
• †Thalamocrinus

• 

  †Thalassinoides
• †Thalassoinoides
• †Thamniscus
• †Thamnopora
  • †Thamnopora limitaris
• †Thamnoptychia
  • †Thamnoptychia alpenensis
  • †Thamnoptychia tuberculata – type locality for species
• †Thecia
  • †Thecia minor – or unidentified comparable form
• †Thuraminoides
  • †Thuraminoides sphaeroidalis
• Thurammina
  • †Thurammina arenicorna
  • †Thurammina limbata
• †Thuramminoides
  • †Thuramminoides sphaeroidalis
• †Thuroholia
  • †Thuroholia spicatus – type locality for species
• †Thymospora
  • †Thymospora pseudothiessenii
• †Tolypaminna
  • †Tolypaminna frizzelli
  • †Tolypaminna rotula
• †Tolypammina
  • †Tolypammina bransoni
  • †Tolypammina bulbosa
  • †Tolypammina cyclops
  • †Tolypammina gersterensis
  • †Tolypammina jacobschapelensis
  • †Tolypammina laocoon – or unidentified related form
  • †Tolypammina rotula
• †Torispora
  • †Torispora securis
• †Torynifer
  • †Torynifer pseudolineata
  • †Torynifer pseudolineatus
  • †Torynifer salemensis
  • †Torynifer setiger
• †Tremanotus
  • †Tremanotus chicagoensis
• †Trematis
  • †Trematis millepuntata
  • †Trematis millipunctata
• †Trematocystis
  • †Trematocystis magniporatus
• †Trematopora
• †Trepeilopsis
  • †Trepeilopsis glomospiroides
  • †Trepeilopsis recurvidens
  • †Trepeilopsis spiralis

• 

  †Treptoceras
  • †Treptoceras cincinnatiensis
  • †Treptoceras duseri
  • †Treptoceras fosteri
  • †Treptoceras hitzi
• †Triamara
  • †Triamara laevis
  • †Triamara tumida
  • †Triamara ventricosa – type locality for species
• †Triangulotarbus – type locality for genus
  • †Triangulotarbus terrehautensis – type locality for species
• †Tricopelta
  • †Tricopelta breviceps

• 

  †Tricrepicephalus
• †Trigonocarpus
• †Trigonoglossa
• †Trimerella
• †Trimerus
  • †Trimerus delphinocephalus
• †Trimoceras
  • †Trimoceras gilberti
• †Triplesia
  • †Triplesia putillus
• †Triquitrites
  • †Triquitrites additus
  • †Triquitrites bransonii
  • †Triquitrites exiguus
  • †Triquitrites minutus
  • †Triquitrites protensus
  • †Triquitrites spinosus
  • †Triquitrites subspinosus
• †Trochonema
  • †Trochonema madisonense
  • †Trochonema umbilicata – or unidentified comparable form
• †Trochophyllum
• †Troosticrinus
  • †Troosticrinus sanctipaulensis
• †Trophocrinus
  • †Trophocrinus tumidus
• †Tropidocaris
• †Tropidoleptus
  • †Tropidoleptus carinatus
• †Tryplasma
  • †Tryplasma parva
• †Tubelelloides
  • †Tubelelloides longus
• †Tuberculatosporites
  • †Tuberculatosporites robustus
• †Tubulelloides
• †Turneropterum – type locality for genus
  • †Turneropterum turneri – type locality for species
• †Turrilepas
• †Twenhofelella
  • †Twenhofelella waldroni – type locality for species
• †Tylothyris

• †Undulabucania
  • †Undulabucania gorbyi – type locality for species
• †Unispirifer
  • †Unispirifer lateralis
  • †Unispirifer rundlensis – or unidentified related form
• †Uperocrinus
  • †Uperocrinus apheles

• †Valvisporites
• †Vandelooaster
  • †Vandelooaster plicatilis
• †Vaurealispongia
  • †Vaurealispongia minuta – type locality for species
• †Vermiforichnus
• †Vermiformichnus
• †Verrucosisporites
  • †Verrucosisporites microtuberosus
  • †Verrucosisporites verrucosus
• †Vesicaspora
  • †Vesicaspora wilsonii
• †Vesicasporites
  • †Vesicasporites wilsonii
• †Vestispora
  • †Vestispora costata
  • †Vestispora fenestrata
  • †Vestispora foveata
  • †Vestispora laevigata
  • †Vestispora pseudoreticulata
• †Voiseyella
  • †Voiseyella novamexicana
• †Voiseyells
  • †Voiseyells novamexicana – or unidentified related form
• †Vorticina
  • †Vorticina cyrtolites

• †Waltzispora
  • †Waltzispora prisca
• †Warsawia
  • †Warsawia lateralis
• †Waylandella
  • †Waylandella dartyensis
• †Welleroceras
  • †Welleroceras liratum
• †Whitfieldella
  • †Whitfieldella intermedia
  • †Whitfieldella nitida
• †Whitfieldoceras – tentative report
  • †Whitfieldoceras casteri
• †Whittleseya
• †Wilsonicrinus
  • †Wilsonicrinus discoideus
• †Wilsoniella
  • †Wilsoniella saffordi
• †Wilsonites
  • †Wilsonites circularis
  • †Wilsonites vesicatus
• †Worthenopora
  • †Worthenopora spinosa

• †Xenocrinus

• †Youngiella – tentative report

• †Zaphrenthis
  • †Zaphrenthis aequus
  • †Zaphrenthis phrygia
• †Zeacrinites
  • †Zeacrinites doverensis
  • †Zeacrinites trapezinatus
  • †Zeacrinites wortheni
• †Zittelloceras
  • †Zittelloceras hitzi
  • †Zittelloceras lentidilatatum
  • †Zittelloceras shidleri
• †Zonidiscus
  • †Zonidiscus youngi

• 

  †Zoophycos
• †Zophocrinus
  • †Zophocrinus howardi
• †Zygospira
  • †Zygospira modesta

• Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 7 August 2017.