Full reference: F. M. Carpenter. 1947. Lower Permian Insects from Oklahoma. Part 1. Introduction and the Orders Megasecoptera, Protodonata, and Odonata. Proceedings of the American Academy of Arts and Sciences 76:25-54
Type specimen: MCZ 4822, a forewing. Its type locality is Midco Locality 15, which is in an Artinskian lacustrine lime mudstone in the Wellington Formation of Oklahoma.
Average measurements (in mm): forewing 15.0 x 5.0