page_title: List of the Paleozoic life of Ohio
section_title: C
hierarchical_section_title: List of the Paleozoic life of Ohio / C
caption_attribution_description: English: Callixylon whiteanum, permineralized wood of a progymnosperm, from the Late Devonian Woodford Shale Ada Oklahoma specimen F108571 in the Condon Collection, Museum of Natural and Cultural History, University of Oregon
context_page_description: 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 541 and 252.17 million years of age.
context_section_description: †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
  †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 
caption: A polished round of the permineralised Late Devonian-Carboniferous wood Callixylon
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