Cephalopoda - Ceratitida - Trachyceratidae
Alternative combination: Trachyceras (Protrachyceras) dunni
Full reference: J. P. Smith. 1914. The Middle Triassic marine invertebrate faunas of North America. United States Geological Survey Professional Paper 83:1-254
Belongs to Eoprotrachyceras according to E. T. Tozer 1980
See also Smith 1914
Sister taxa: Eoprotrachyceras americanum, Eoprotrachyceras curionii, Eoprotrachyceras gibsoni, Eoprotrachyceras gredleri, Eoprotrachyceras lahontanum, Eoprotrachyceras matutinum, Eoprotrachyceras meeki, Eoprotrachyceras subasperum
Type specimen: Its type locality is Divide between Troy Canyon and South Fork of American Canyon (subasperum), which is in a Fassanian marine limestone in Nevada
Ecology: nektonic carnivore
Distribution: found only at Divide between Troy Canyon and South Fork of American Canyon (subasperum)
Specimen images are retrieved through the ePANDDA API.
Click image to enlarge. Click to access iDigBio record.