Trilobita - Agnostida - Agnostidae

Full reference: S. R. Westrop and J. D. Eoff. 2012. Late Cambrian (Furongian; Paibian, Steptoean) agnostoid arthropods from the Cow Head Group, western Newfoundland. Journal of Paleontology 86(2):201-237

Belongs to Acmarhachis according to S. R. Westrop and J. D. Eoff 2012

Sister taxa: Acmarhachis acuta, Acmarhachis apicula, Acmarhachis karatauensis, Acmarhachis longispinus, Acmarhachis punctatus, Acmarhachis typicalis, Acmarhachis whittingtoni

Type specimen: GSC 134590, a pygidium. Its type locality is Hickey Cove HC 202, which is in a Steptoean shallow subtidal conglomerate in the Shallow Bay Formation of Canada.

Ecology: slow-moving nektonic suspension feeder