Cephalopoda - Ellesmerocerida - Ellesmeroceratidae

Alternative combination: Ellesmeroceras robsonensis

Belongs to Robsonoceras according to R. H. Flower 1964

Sister taxon: Robsonoceras manitouense

Type specimen: a series of syntypes in the USNM. Its type locality is Billings Butte, E of Robson Peak, which is in a Gasconadian marine horizon in the Cushina Formation of Canada.