Alternative combinations: Knightites (Retispira) eximia, Retispira eximia
Full reference: E. L. Yochelson. 1960. Permian Gastropoda of the southwestern United States. 3. Bellerophontacea and Patellacea. Bulletin of the American Museum of Natural History 119(4):208-293
Sister taxa: none
Type specimen: USNM 114265, a shell. Its type locality is USNM712b, Orogrande, which is in an Artinskian shallow subtidal limestone in the Hueco Formation of New Mexico.
Ecology: slow-moving low-level epifaunal detritivore
Average measurements (in mm): shell 20.8 x 23.2