Trilobita - Agnostida - Agnostidae

Full reference: C. E. Resser. 1938. Middle Cambrian fossils from Pend Oreille Lake, Idaho. Smithsonian Miscellaneous Collections 97(3):1-12

Belongs to Agnostus according to C. E. Resser 1938

Sister taxa: Agnostus artilimbatus, Agnostus babcocki, Agnostus brighamensis, Agnostus captiosus, Agnostus neglectus, Agnostus rakuroensis, Agnostus valentinus

Type specimen: USNM 95025. Its type locality is Locality 37n (Pend Oreille Lake), which is in a Cambrian carbonate limestone/shale in the Lakeview Formation of Idaho.

Ecology: nektobenthic suspension feeder