Trilobita - Proetida - Hystricuridae

Full reference: L. F. Hintze. 1952. Lower Ordovician trilobites from western Utah and eastern Nevadea. Utah Geological and Mineralogical Survey Bulletin 48:249 p.

Belongs to Paraplethopeltis according to W. D. Boyce 1989

Sister taxa: Paraplethopeltis cordai, Paraplethopeltis genarectus, Paraplethopeltis minuta, Paraplethopeltis seelyi

Type specimen: 26173 (AMNH), a cephalon/head (cranidium)

Ecology: fast-moving low-level epifaunal deposit feeder