Trilobita - Proetida - Bathyuridae

Full reference: W. D. Boyce. 1989. Early Ordovician trilobite faunas of the Boat Harbour and Catoche Formations (St. George Group) in the Boat-Harbour-Cape Norman area, Great Northern Peninsula, western Newfoundland. Geological Survey Branch, Department of Mines and Energy, Newfoundland and Labrador, Report 89-2 1-168

Belongs to Grinnellaspis according to W. D. Boyce 1989

Sister taxa: none

Type specimen: NFM F-170, a pygidium. Its type locality is BH-55-93, which is in a Jeffersonian peritidal lime mudstone/wackestone in the Boat Harbour Formation of Canada.

Ecology: fast-moving low-level epifaunal deposit feeder