Cyrtogomphoceras is a genus of nautiloid cephalopods, recognized by its large breviconic shell with a notable endogastric curvature. The shell is fusiform...

be derived from Strandoceras although derivation is possibly from Cyrtogomphoceras, which is intermediary in form. Flower, Rousseau H. and Curt Teichert...

within the discosorid family Cyrtogomphoceratidae that also includes Cyrtogomphoceras, and not in the line which gave rise to the Phragmoceratidae. Flower...

†Cyrtobaltoceras †Cyrtoceras †Cyrtoceratites †Cyrtocerina †Cyrtocheilus †Cyrtogomphoceras †Cyrtogomphus †Cyrtonybyoceras †Cyrtorizoceras †Cyrtospyroceras †Cyrtothoracoceras...

†Crepicephalus rectus †Crepicephalus snowyenis †Crepicephalus snowyensis †Cyrtogomphoceras †Dartonaspis †Dartonaspis wichitaensis †Dartonaspis witchitaensis †Deadwoodia...

the Middle Ordovician to the Lower Silurian. The family includes: Cyrtogomphoceras Kiaeroceras Konglungenoceras Landeroceras Parryoceras Strandoceras...

animasensis †Cyrtiopsis conicula †Cyrtiopsis kindlei †Cyrtodonta †Cyrtogomphoceras †Cyrtospirifer †Cyrtospirifer animasensis †Cyrtospirifer whitneyi Contents...

†Cordylodus †Crepicephalus †Ctenacanthus †Ctenacanthus amblyxiphias †Cyrtogomphoceras †Deckera †Dentalium †Distichophytum †Drepanophycus †Earlandia †Edmondia...

†Cymbosporites proteus †Cymbosporites senex †Cypricardella – tentative report †Cyrtogomphoceras †Cyrtoniodus †Cyrtoniodus complicatus †Cyrtoniodus erectus †Cyrtorostra...

gave rise to the Phragmoceratidae and very likely to Kiaeroceras and Cyrtogomphoceras, which in turn gave rise to Landeroceras, within the Cyrtogomphoceratidae...

genus †Cutleria wilmarthi – type locality for species †Cyclopteris †Cyrtogomphoceras †Cyrtospirifer †Cyrtospirifer animasensis †Cyrtospirifer whitneyi †Echinosphaerites...