Cephalopoda - Nautilida - Tainoceratidae

Alternative combination: Pleuronautilus idahoensis

Full reference: B. Kummel. 1953. American Triassic coiled nautiloids. United States Geological Survey Professional Paper 250:1-104

Belongs to Phaedrysmocheilus according to N. P. Schastlivtseva 1988

Sister taxa: Phaedrysmocheilus nestori, Phaedrysmocheilus olenekensis, Phaedrysmocheilus subaratus, Phaedrysmocheilus velivolus

Type specimen: USNM 107079. Its type locality is Hot Springs, Columbites Zone, which is in a Spathian offshore shale in the Thaynes Formation of Idaho.

Ecology: nektobenthic carnivore