Trilobita - Ptychopariida - Alokistocaridae

Full reference: C. E. Resser. 1939. The Spence Shale and its fauna. Smithsonian Miscellaneous Collections 97(12):1-29

Belongs to Elrathia according to C. E. Resser 1939

Sister taxa: Elrathia hoboi, Elrathia idahoensis, Elrathia longiceps, Elrathia rara, Elrathia sampsoni

Type specimen: USNM 96540

Ecology: fast-moving epifaunal detritivore