PaleoDB taxon number: 209038
Alternative combination: Cychrus testeus
Full reference: S. H. Scudder. 1878. The Fossil Insects of the Green River Shales. Bulletin of the United States Geological and Geographical Survey of the Territories 4(4):747-776
Sister taxon: Neothanes europaeus
Type specimen: 4059, an elytra (pair of elytra). Its type locality is Petrified fish cut (Scudder collection), which is in a Bridgerian lacustrine - large diatomite/shale in the Green River Formation of Wyoming.
Average measurements (in mm): body 11.0 x 4.8, elytron 7.25 x 2.50, prothorax 2.15 x 3.50