Selected Paleozoic taxa of Ohio

• †Achatella
• †Acidaspis
• †Acleistoceras – tentative report
• †Acutichiton – type locality for genus
• †Adamanterpeton – type locality for genus
  • †Adamanterpeton ohioensis – type locality for species
• †Aethaspis
• †Agnesia
• †Alethopteris
• †Ambedus – type locality for genus
• †Amphiscapha
• †Amplexopora
• †Annularia
  • †Annularia asteris
  • †Annularia radiata
  • †Annularia sphenophylloides
  • †Annularia stellata
• †Anthracodromeus
  • †Anthracodromeus longipes – type locality for species
• 

  Restoration of the face of the Carboniferous reptiliomorph Anthracosaurus
  †Anthracosaurus
• †Aphlebia
• †Archaeothyris
• †Arctinurus
• †Armenoceras
• †Artisia
• †Asterotheca
• †Athyris
• †Atrypa
  • †Atrypa reticularis
  • †Atrypa reticularus – report made of unidentified related form or using admittedly obsolete nomenclature
• †Augustoceras
• †Aulopora
  • †Aulopora microbuccinata
• †Aviculopecten
  • †Aviculopecten appalachianus – type locality for species
  • †Aviculopecten columbianus – type locality for species
  • †Aviculopecten coxanus
  • †Aviculopecten fasciculatus
  • †Aviculopecten occidentalis
  • †Aviculopecten winchelli
• †Baldwinonus
• †Bellerophon
  • †Bellerophon jeffersonensis
  • †Bellerophon spergensis
• †Bembexia
• †Bickmorites
• 

  Life restoration of the Carboniferous amphibian Brachydectes
  †Brachydectes – type locality for genus
  • †Brachydectes newberryi – type locality for species
• †Broiliellus
• †Calamites
  • †Calamites carinatus
  • †Calamites cisti
  • †Calamites suckowi
  • †Calamites suckowii
  • †Calamites undulatus
• †Callixylon
• †Camarotoechia
• 

  Restoration of the Middle Ordovician-Silurian nautiloid cephalopod Cameroceras feeding on an Aphetoceras, while a quartet of Cyclostomiceras swim by
  †Cameroceras
• †Catenipora
• †Centroceras
• †Ceratocephala
• †Ceratopsis
• †Ceraurinus
• †Ceraurus
• †Chagrinia
• †Charactoceras
• †Chasmatopora
• †Chasmops
• †Chaunograptus
• †Chondrites
• †Chonetes
• 

  Assemblage of fossilized shells of the Ordovician brachiopod Cincinnetina
  †Cincinnetina
  • †Cincinnetina meeki
  • †Cincinnetina multisecta
• †Cladochonus
• †Cladoselache
• †Clarkesvillia
• †Climacograptus
• †Coenites
• †Colosteus
• †Columnaria
  • †Columnaria calicina
• †Composita
  • †Composita subtilita
• †Conchidium
• †Constellaria
• †Cordaites
  • †Cordaites principalis – or unidentified comparable form
• †Cornulites
  • †Cornulites flexuosus
• Craniella
• †Crepipora
• †Ctenacanthus
• †Ctenerpeton
• †Ctenospondylus
• †Cyclonema
• †Cyclopteris
• †Cypricardinia
  • †Cypricardinia indenta
• †Cyrtolites
• †Cyrtospirifer
• †Cystodictya
• †Decadocrinus
• †Diceratosaurus
  • †Diceratosaurus brevirostris – type locality for species
• †Dictyonema
• †Dinichthys
  • †Dinichthys herzeri
• †Diploceraspis
• †Diplograptus
• Discina
• †Dolichopterus
• 

  Mounted skull of the Late Devonian placoderm fish Dunkleosteus
  †Dunkleosteus
• †Ecdyceras
• †Edmondia
• †Edon
• †Eldredgeops
  • †Eldredgeops rana
• †Elita
• †Elpe
• †Elrodoceras
• †Emmonsia
• †Endoceras
• †Erettopterus
• †Erpetosaurus
• †Eucalyptocrinites
• †Euomphalus
  • †Euomphalus planodorsatus
• 

  Life restoration of Silurian eurypterid ("sea scorpion") Eurypterus
  †Eurypterus
  • †Eurypterus ornatus
• †Eusauropleura – type locality for genus
• †Faberia
• †Faberoceras
• †Favosites
  • †Favosites discoideus
  • †Favosites favosus
  • †Favosites hisingeri
  • †Favosites turbinatus
• †Fayettoceras
• †Fenestella
• †Flexicalymene
  • †Flexicalymene meeki
• †Foerstia
• †Fusulina
• †Gilbertsocrinus
• †Glyptocrinus
• 

  Multiple views of a fossil of the Ordovician horn coral Grewingkia
  †Grewingkia
  • †Grewingkia rusticum
• †Hallopora
  • †Hallopora subnodosa
• †Halysites
• †Hamiltonella
• †Helcionopsis
• †Heliophyllum
  • †Heliophyllum halli
• †Helminthochiton
• †Hexagonaria
• †Hexameroceras
• †Hindia
• †Holopea
• †Holoptychus – or unidentified comparable form
• †Hyolithes
• †Icriodus
• †Iocrinus
• †Isodectes
• †Isonema
• 

  Fossil of the Middle-Late Ordovician giant trilobite Isotelus.
  †Isotelus
  • †Isotelus maximus
• †Kindleoceras
• †Kionoceras
• †Kockelella
• †Lambeoceras
• †Leiosphaeridia
• †Lepidodendron
  • †Lepidodendron aculeatum
• Lingula
• †Liroceras – tentative report
• †Loxomma
  • †Loxomma lintonensis – type locality for species
• †Maelonoceras
• †Manitoulinoceras
• †Manticoceras
• †Marsupiocrinus
• 

  Life restoration of the Carboniferous amphibian Megalocephalus
  †Megalocephalus – type locality for genus
  • †Megalocephalus lineolatus – type locality for species
• †Megalograptus
• †Metaxys
• †Michelinoceras
• Modiolus
• †Molgophis – type locality for genus
• †Mucrospirifer
  • †Mucrospirifer grabaui – or unidentified comparable form
  • †Mucrospirifer mucronatus
  • †Mucrospirifer prolificus
• †Murchisonia
• 

  Fossilized shell of the Early Devonian – Triassic sea snail Naticopsis
  †Naticopsis
  • †Naticopsis comperta
  • †Naticopsis levis
• †Neospirifer
  • †Neospirifer cameratus
  • †Neospirifer dunbari
• †Neuropteris
  • †Neuropteris heterophylla
  • †Neuropteris ovata
  • †Neuropteris scheuchzeri
• †Nodonema
• Nucula
• † Nyassa
• †Odonterpeton – type locality for genus
  • †Odonterpeton triangulare – type locality for species
• †Odontopleura
• †Oestocephalus – type locality for genus
  • †Oestocephalus amphiuminum – type locality for species
• †Olenoides
• †Oncoceras
• 

  Life restoration of the Carboniferous-Permian synapsid (mammal precursor) Ophiacodon
  †Ophiacodon
  • †Ophiacodon uniformis – or unidentified comparable form
• †Orthoceras
• †Oulodus
• †Ozarkodina
  • †Ozarkodina confluens
• †Paraspirifer
• †Pattersonia
• †Pecopteris
  • †Pecopteris arborescens
  • †Pecopteris hemitelioides
  • †Pecopteris unita
• †Pentamerus
• †Petalodus
• 

  Life restoration of the Carboniferous-Permian amphibian Phlegethontia.
  †Phlegethontia – type locality for genus
  • †Phlegethontia linearis – type locality for species
  • †Phlegethontia longissima – type locality for species
• †Phragmolites
  • †Phragmolites elegans – type locality for species
• †Phylloporina
• Pinna
• †Plaesiomys
• †Platyceras
  • †Platyceras bucculentum
  • †Platyceras carinatum
  • †Platyceras rarispinum
• †Platyrhinops – type locality for genus
• 

  Fossilized shell of the Middle Ordovician-Silurian brachiopod Platystrophia
  †Platystrophia
  • †Platystrophia acutilirata
  • †Platystrophia annieana
  • †Platystrophia clarksvillensis
  • †Platystrophia cypha
  • †Platystrophia moritura
• †Pleurodictyum
• †Pleuroptyx – type locality for genus
• †Pleurorthoceras
• †Poleumita
• †Polygnathus
  • †Polygnathus eiflius
  • †Polygnathus linguiformis
  • †Polygnathus pseudofoliatus
  • †Polygnathus xylus
• †Posidonia
• †Proetus
• †Protobalanus
• †Protosalvinia
• 

  Life restoration with a conifer-like body plan of the Silurian-Late Devonian tree-like probable fungus Prototaxites. John William Dawson (1888).
  †Prototaxites
• †Pterochiton
• †Pterotheca
• †Pterygotus
• †Ptyonius
  • †Ptyonius marshii – type locality for species
• †Pugnax
• †Reteocrinus
• †Rhizocorallium
• †Richmondoceras
• †Rusophycus
• †Samaropsis
• †Sauropleura – type locality for genus
  • †Sauropleura pectinata – type locality for species
• †Sigillaria
  • †Sigillaria brardii
  • †Sigillaria elegans
• †Similodonta – tentative report
• Solemya
• †Solenomorpha
• †Sowerbyella
• 

  Fossilized leaves and branches of the Devonian-Triassic horsetail relative Sphenophyllum
  †Sphenophyllum
  • †Sphenophyllum majus
  • †Sphenophyllum oblongifolium
• †Sphenopteris
  • †Sphenopteris elegans – or unidentified comparable form
• †Sphenothallus
• †Spirifer
  • †Spirifer opimus
• Spirorbis
• †Spyroceras
• †Stegops
• 

  Life restorations of a male (foreground) and female (background) of the Late Devonian-Carboniferous Chimaera relative Stethacanthus
  †Stethacanthus
  • †Stethacanthus altonensis
• †Stigmatella
• †Strophomena
  • †Strophomena concordensis
  • †Strophomena erratica
  • †Strophomena extenuata
  • †Strophomena neglecta
  • †Strophomena nutans
  • †Strophomena planumbona
  • †Strophomena sulcata
• †Stylonema
• †Subulites
• †Syntomopterus
• †Syringopora – tentative report
• †Teichichnus
• †Tentaculites
• †Tetradium
• †Tornoceras
• †Treptoceras
• †Triarthrus
• †Triendoceras – tentative report
• †Trocholites
• 

  Life restoration of the Carboniferous amphibian Tuditanus
  †Tuditanus – type locality for genus
  • †Tuditanus punctulatus – type locality for species
• †Urasterella
• †Vinella
• †Walchia
• †Westonoceras
• †Whiteavesia
• †Wilkingia
• †Worthenia
• †Wurmiella
  • †Wurmiella excavata
• †Xyloiulus
• †Zittelloceras
• †Zoophycos