Cephalopoda - Bisonocerida - Piloceratidae
Parent taxon: Bisonocerida according to D. H. Evans and A. H. King 2012
See also Crick 1981, Evans 2011, Flower 1958 and Kröger and Landing 2009
Sister taxa: Allotrioceratidae, Bisonoceratidae, Chihlioceratidae, Coreanoceratidae, Emmonsoceratidae, Humeoceratidae, Manchuroceratidae, Padunoceratidae, Proterovaginoceratidae, Sinoendoceratidae
Subtaxa: Allopiloceras Augeoceras Cassinoceras Dartonoceras Expandocassinoceras Liaotungoceras Penhsioceras Piloceras Subpenhsioceras Utoceras
Ecology: fast-moving nektonic carnivore
Distribution:
• Arenig of Argentina (1 collection), China (3)
• Canadian of Canada (1: Quebec)
• Ordovician of Australia (1), Canada (12: Newfoundland, Newfoundland and Labrador, Quebec), China (3), Norway (1), Svalbard and Jan Mayen (2), the United Kingdom (9), United States (21: Arkansas, Colorado, New York, Oklahoma, Tennessee, Texas, Vermont, Virginia)
• Tremadoc of China (1)
Total: 55 collections including 79 occurrences