Cephalopoda - Nautilida - Tainoceratidae

Alternative combination: Nautilus subaratus

Belongs to Phaedrysmocheilus according to A. S. Dagis et al. 1996

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

Ecology: nektobenthic carnivore

Average measurements (in mm): shell width 24.0, shell diameter 48.2