List of the Paleozoic life of Indiana

• †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 • , or the mushroom crinoid †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 ==B==

• 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 ==C==

• †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 ==D==

• †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 ==E==

• †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 ==F==

• †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 ==G==

• †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 ==H==

• †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 • , also known as a Petoskey stone †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 ==I==

• †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 ==K==

• †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 ==L==

• †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 • . Eli Heimans (1911). †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 ==M==

• †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 ==N==

• †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 ==O==

• †Odontophyllum • †Odontophyllum convergens • †Odontopleura'' – tentative report • †Odontopteris • †Odontopteris subcuneata • †Ohiocrinus • †Ohiocrinus brauni • †Oligocarpia • †Oligocarpia missouriensis • †Omospira • †Omospira alexandra – or unidentified comparable form • †Omphalophloios • †Omphalophloios wagneri – type locality for species • †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 ==P==

• †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 • . Auguste Faguet (1877). †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 • , or winged oyster †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 ==Q==

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

• †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 ==S==

• †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 ==T==

• †Tabulipora • †Tabulipora cestriensis • †Tabulipora ramosa • †Taeniodictya • †Tamiobatis • †Tamiobatis springeri • †Tasmanites • (right) †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 ==U==

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