†family Allotrioceratidae Flower 1955 (mollusk)
Cephalopoda - Bisonocerida - Allotrioceratidae
Parent taxon: Bisonocerida according to D. H. Evans and A. H. King 2012
See also Crick 1981, Evans 2011, Flower 1955, Flower 1958 and Teichert et al. 1964
Sister taxa: Bisonoceratidae, Chihlioceratidae, Coreanoceratidae, Emmonsoceratidae, Humeoceratidae, Manchuroceratidae, Padunoceratidae, Piloceratidae, Proterovaginoceratidae, Sinoendoceratidae
Subtaxa: Allotrioceras Cacheoceras Mirabiloceras Williamsoceras
Type: Allotrioceras
Ecology: fast-moving nektonic carnivore
Distribution:
• Chazyan of United States (2: New York collections)
• Ordovician of the United Kingdom (1), United States (2: Utah)
Total: 5 collections each including a single occurrence