Full reference: T. D. A. Cockerell. 1921. Eocene Insects from the Rocky Mountains. Proceedings of the United States National Museum 57:233-260
Sister taxa: none
Type specimen: USNM 66581, an exoskeleton. Its type locality is USGS 17-5; Cathedral Bluffs south of Little Tommies Draw, which is in a Bridgerian lacustrine - large shale in the Green River Formation of Colorado.
Average measurements (in mm): body length 14.5, wing length 12.0