PaleoDB taxon number: 295581
Alternative combination: Callidium grandaevum
Full reference: H. F. Wickham. 1917. New Species of Fossil Beetles from Florissant, Colorado. Proceedings of the United States National Museum 52:463-472
Type specimen: USNM 63449, an exoskeleton. Its type locality is Florissant (USNM Collection), which is in a Chadronian lacustrine - large shale in the Florissant Formation of Colorado.
Average measurements (in mm): body length 13.5