This list of the Paleozoic life of Ohio contains the various prehistoric life-forms whose fossilized remains have been reported from within the US state of Ohio and are between 538.8 and 252.17 million years of age.
A
†Abylea – type locality for genus †Abylea minuta – type locality for species †Acacocrinus †Acacocrinus anebos †Acanthatia †Acanthoclema †Acanthoclema lineatum †Acanthoclema ohioensis †Acanthoclema sulcatum †Acanthonema †Acanthonema holopiforme †Acanthonema newberryi †Acanthopecten †Acanthopecten bellosum – type locality for species †Acanthopecten carboniferus †Acanthotriletes †Acanthotriletes aculeolatus †Achatella †Acidaspis †Acidaspis cincinnatiensis †Acleistoceras – tentative report †Acmaeoblatta – type locality for genus †Acmaeoblatta lanceolata – type locality for species †Acriora †Acriora petala †Acteonina †Acteonina hanseni – type locality for species †Actinodesma †Actinodesma erectum †Actinopteria †Actinopteria boydi †Acutichiton – type locality for genus †Acutichiton pyrmidalus – type locality for species †Adamanterpeton – type locality for genus †Adamanterpeton ohioensis – type locality for species †Aechmina †Aechmina richmondensis †Aethaspis †Agelacrinites †Agelacrinites southworthi – or unidentified comparable form †Agnesia †Agnesia prosseri †Alaionema †Alaionema crenulatum †Alaskozygopleura †Alaskozygopleura gracillium †Alatisporites †Alatisporites trialatus †Alethopteris †Allocryptaspis †Alloiopteris †Alloiopteris erosa †Allonema †Allonychia †Allorisma †Allorisma costatum †Alveolites †Alveolites labechii †Ambedus – type locality for genus †Ambedus pusilus – type locality for species †Ambocoelia †Ambocoelia norwoodi †Ambocoelia umbonata †Ambonychia †Ambonychia alata †Ambonychia cultrata †Ambonychia richmondensis †Ambonychia suberecta †Ambozone †Ambozone peoriensis – or unidentified comparable form †Ametroblatta †Ametroblatta strigosa – type locality for species †Ameura †Ameura missouriensis †Ammonidium †Ammonidium hamatum †Amphilichas †Amphiscapha †Amphiscapha catilloides †Amphiscapha reedsi †Amplexopora †Amplexopora pustulosa †Amplexopora robusta †Anaptychus – tentative report †Anaptychus emersoni †Anartiocystis †Anartiocystis foerstei †Anaspyroceras †Ancienta †Ancienta ohioensis †Annularia †Annularia asteris †Annularia radiata †Annularia sphenophylloides †Annularia stellata †Anomalocrinus †Anomalodonta †Anomalodonta costata †Anomalotoechus †Anomalotoechus tuberatus †Anostylostroma †Anostylostroma columnare †Anostylostroma laxum †Anozyga – type locality for genus †Anozyga bulla – type locality for species †Anthracodromeus †Anthracodromeus longipes – type locality for species †Anthracopupa – type locality for genus †Anthracopupa ohioensis – type locality for species †Anthracosaurus †Anthracosaurus lancifer – type locality for species †Antiquaster †Antiquaster magrumi †Antiquatonia †Antiquatonia costata †Antiquatonia portlockianus †Aparchites †Aparchites minutissimus †Aparchites oblongus †Aphelakardia †Aphelakardia alternistriata †Aphlebia †Apiculatasporites †Apiculatasporites acueatus †Apiculatasporites latigranifer †Apiculatasporites saetiger †Apiculatasporites setulosus †Arabellites †Archaeothyris †Archegogryllus – type locality for genus †Archegogryllus priscus – type locality for species †Archinacella †Archinacella rugatina †Arcochiton – type locality for genus †Arcochiton raymondi – type locality for species †Arctinurus †Arjamannia †Arjamannia inexpectans †Armenoceras †Arthraria †Arthraria biclavata †Arthroacantha †Arthroacantha carpenteri †Arthropitys Arthropoma †Arthropoma shafferi †Arthrostylus †Artisia †Ascodictyon †Ascodictyon fusiforme †Asolanus †Asolanus camptotaenia †Asolanus sigillarioides †Aspidopora †Aspidopora newberryi †Astartella †Astartella clinata – type locality for species †Astartella concentrica †Astartella varica †Astartella vera †Asterotheca †Atactoblatta – type locality for genus †Atactoblatta anomala – type locality for species †Atactoechus †Atactoechus typicus – or unidentified comparable form †Atactopora †Atactoporella †Ateleocystites †Athyris †Athyris vittata †Atraktoprion †Atrypa †Atrypa reticularis †Atrypa reticularus – report made of unidentified related form or using admittedly obsolete nomenclature †Augustoceras †Aulacella †Aulacera †Aulacera nodulosa †Aulocystis †Aulocystis auloporoidea †Aulocystis auloporoides †Aulocystis flabellata †Aulocystis jacksoni †Aulocystis lucasensis †Aulopora †Aulopora microbuccinata †Aulopora serpens †Austinella †Austinella scovellei †Aviculopecten †Aviculopecten appalachianus – type locality for species †Aviculopecten columbianus – type locality for species †Aviculopecten coxanus †Aviculopecten fasciculatus †Aviculopecten occidentalis †Aviculopecten princeps †Aviculopecten winchelli †Aviculopinna †Aviculopinna peracuta
B
†Bactrites – tentative report †Bactrites arkonensis – or unidentified comparable form Bairdia †Bairdia devonica †Balbiniconcha †Balbiniconcha hebe †Baldwinonus †Baldwinonus dunkardensis †Barathrisphaeridium †Barathrisphaeridium chagrinense †Barathrisphaeridium pumilispinosum †Barbclabornia †Barbclabornia luedersensis †Barychilina †Batostoma †Batostoma varians †Batostomella †Batostomella gracilis †Batostomella striata †Baylea †Baylea giffordi – or unidentified comparable form †Baylea inclinata – type locality for species †Beatricea †Beatricea undulata †Bellerophon †Bellerophon hyalina †Bellerophon jeffersonensis †Bellerophon newberryi †Bellerophon pelops †Bellerophon spergensis †Bellerophon stevensianus †Bellerophon stummi – type locality for species †Bellerophon whittleseyi – type locality for species †Belodella †Beloitoceras †Beloitoceras amoenum †Bembexia †Bembexia adjutor – type locality for species †Bembexia insolita Berenicea †Bethanyphyllum †Bethanyphyllum robustum †Bicarina †Bicarina petilitornata †Bickmorites †Bikocrinus †Bikocrinus baios †Billingsastraea †Billingsastraea longicarinata †Billingsastrea †Billingsastrea longicarinata †Blattinopsis †Blattinopsis americana – type locality for species †Blattinopsis anthracina – type locality for species †Blattinopsis latipennis – type locality for species †Bodmania †Bollia †Bollia persulcata †Bollia regularis †Botryllopora †Botryllopora socialis †Botryocrinus †Botryocrinus neimani †Bowmanites †Bowmanites incurvata †Bowmanites magna †Brachiospongia †Brachydectes – type locality for genus †Brachydectes newberryi – type locality for species †Brockocystis †Brockocystis nodosaria †Broiliellus †Broiliellus hektotopos – type locality for species †Bucanella †Bucania †Bucania crassa †Bucanopsis †Buthotrephis †Buthotrephis gracilis †Byssonychia †Byssonychia grandis †Byssonychia radiata Bythocypris †Bythocypris cylindrica †Bythocypris punctatus †Bythopora †Bythopora delicatula †Bythopora striata
C
†Calamites †Calamites carinatus †Calamites cisti †Calamites citiifromis †Calamites sachsi †Calamites schützeiformis †Calamites suckowi †Calamites suckowii †Calamites undulatus †Calamospora †Calamospora breviradiata †Calamospora hartungiana †Calamospora straminea †Calamostachys †Calamostachys bisporangiata – type locality for species †Calamostachys germanica †Calamostachys interculata – type locality for species †Calamostachys longibracteata – type locality for species †Calamostachys minuta – type locality for species †Calamostachys recurvata – type locality for species †Calamostachys tuberculata †Calapoecia †Calceocrinus †Calceocrinus incertus †Callipleura †Callipleura nobilis – or unidentified comparable form †Callixylon †Callixylon clevelandensis †Callixylon newberryi †Calloporella †Calostylis – tentative report †Calostylis lindstroemi †Calvibembexia †Calvibembexia sulcomarginata †Camarotoechia †Camarotoechia semiplicata †Cameroceras †Cardiocarpon †Cardiomorpha †Cardiomorpha missouriensis †Carneyella †Carneyella foerstei †Caryocrinites †Catazone †Catazone eversolensis – type locality for species †Catazyga †Catazyga headi †Catenipora †Catenipora favositomima †Catenipora favositomina †Catenipora gotlandica †Caulopteris †Caulopteris antiqua †Caulopteris peregrina †Cayugaea †Cayugaea intermittens †Cayugaea transitorius – tentative report †Centroceras †Centrorhynchus (= Sartenaerus) †Ceramoporella †Ceramoporella granulosa †Ceramoporella ohioensis †Ceratocephala †Ceratoikiscum †Ceratoikiscum bujugum †Ceratoikiscum spinosiarcuatum †Ceratoikiscump †Ceratoikiscump erittacanthinum †Ceratoikiscump lanistellare †Ceratopsis †Ceratopsis chambersi †Ceratopsis oculifera †Ceraurinus †Ceraurinus icarus †Ceraurus †Chaenomya †Chaenomya leavenworthensis †Chagrinia †Chagrinichnites †Charactoceras †Chasmatopora †Chasmops †Chaunograptus †Chiloporella †Chlidochirus †Chlidochirus springeri †Chondrites †Chonetes †Chonetes aurora – tentative report †Chonetes deflectus †Chonetes minutus †Chonetes mucronatus – tentative report †Chonetina †Chonetina choteauensis †Chonetinella †Chonetinella flemingi †Chonetinella verneuilana †Chonetinella verneuiliana †Cincinnaticrinus †Cincinnatidiscus †Cincinnetina †Cincinnetina meeki †Cincinnetina multisecta †Cirratriradites †Cirratriradites annulatus †Cladochonus †Cladopora †Cladopora bifurcata †Cladopora crassa †Cladopora lucasensis †Cladopora minuitissima †Cladopora roemeri †Cladoselache †Cladoselache clarki †Clarkesvillia †Clathrodictyon †Clathrodictyon confertum †Clathrospira †Claudeonychia – type locality for genus †Claudeonychia babini – type locality for species †Cleionychia †Clemetaocrinus †Clemetaocrinus ohioensis †Clevelandodendron †Clevelandodendron ohioensis †Climacograptus †Clinopistha †Clinopistha radiata †Coelocaulus †Coelocaulus desiderata †Coelocaulus strebloceras – tentative report †Coeloclema †Coeloclema oweni †Coenites †Coleolus †Coleolus iowensis †Colosteus †Colosteus scutellatus – type locality for species †Columnaria †Columnaria calicina †Comasphaeridium †Comasphaeridium caesariatum †Composita †Composita subtilita †Compsocrinus †Compsocrinus harrisi †Conchidium †Conradidium †Conradidium firmamentum †Constellaria †Conularia †Conularia formosa †Convolutispora †Convolutispora mellita †Cordaianthus †Cordaites †Cordaites principalis – or unidentified comparable form †Cornellites †Cornellites flabellum †Cornulites †Cornulites flexuosus †Corocrinus †Corocrinus noduosus †Corynotrypa †Corynotrypa delicatula †Corynotrypa inflata †Corythoecia †Corythoecia dichoptera †Costatulites †Costatulites richmondensis †Cranaena †Cranaena romingeri Craniella †Craniella hamiltonae †Crassisphaeridium †Crassisphaeridium inusitatum †Crassispora †Crassispora kosankei †Crenistriella †Crenistriella rotalinea †Crenulazona †Crenulazona angulata †Crepipora †Crurithyris †Crurithyris planoconvexa †Cryptolithus †Cryptolithus tesselata †Ctenacanthus †Ctenacanthus compressus †Ctenerpeton †Ctenerpeton remex – type locality for species †Ctenobolbina †Ctenobolbina ciliata †Ctenobolbina duryi †Ctenobolbina hammeli †Ctenodonta †Ctenodonta madisonensis †Ctenodonta recurva †Ctenospondylus †Ctenospondylus ninevehensis †Cuffeyella †Cuffeyella arachnoidea †Cunctocrinus †Cunctocrinus fortunatus – type locality for species †Cuneamya †Cuneamya elliptica †Cuneamya miamiensis †Cuneamya scapha †Cupularostrum †Cupularostrum prolificum †Cupulocrinus †Cycloconcha †Cyclocystoides †Cyclogranisporites †Cyclogranisporites microgranus †Cyclogranisporites minutus †Cyclogranisporites obliquus †Cyclogranisporites orbicularis †Cyclonema †Cyclonema bilix †Cyclonema gyronemoides †Cyclonema humerosum †Cyclonema minuta †Cyclopteris †Cyclopteris orbicularis