Reptilia - Testudines - Trionychidae

Alternative combination: Trionyx vagans

Belongs to Aspideretes according to O. P. Hay 1908

Sister taxa: Aspideretes austerus, Aspideretes coalescens, Aspideretes fontanus, Aspideretes latus, Aspideretes maturus, Aspideretes ovatus, Aspideretes perplexus, Aspideretes planus, Aspideretes rugosus, Aspideretes vorax, Trionyx (Aspideretes) fuchienensis

Type specimen: AMNH 1847, a partial shell (shell fragment). Its type locality is Bijou Creek (USG&GS), which is in a Maastrichtian terrestrial horizon in the Laramie Formation of Colorado.