Cephalopoda - Nautilida - Grypoceratidae

Alternative combination: Grypoceras (Gryponautilus) cooperi

Full reference: J. P. Smith. 1927. Upper Triassic marine invertebrate faunas of North America. United States Geological Survey Professional Paper 141:1-262

Belongs to Gryponautilus according to B. Kummel 1953

See also Smith 1927

Sister taxa: Gryponautilus galeatus, Gryponautilus kegalensis, Gryponautilus suessi, Gryponautilus truschelevi

Type specimen: Its type locality is Bear Cove, north end and east side of Brock Mountain, which is in a Tuvalian carbonate limestone in the Hosselkus Formation of California

Ecology: nektobenthic carnivore

Average measurements (in mm): shell diameter 38.8

Distribution: found only at Bear Cove, north end and east side of Brock Mountain

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Specimen images are retrieved through the ePANDDA API.