Cephalopoda - Tarphycerida - Tarphyceratidae
Full reference: A. Hyatt. 1894. Phylogeny of an acquired characteristic. Proceedings of the American Philosophical Society 32(143):349-647
Parent taxon: Tarphycerida according to D.H. Evans 2011
See also Crick 1981, Kröger and Landing 2008, Kröger and Landing 2009 and Stumbur 1962
Sister taxa: Bateroboceras, Bodieceras, Craftonoceras, Discoceratidae, Estonioceratidae, Inclytoceras, Magdoceras, Ophidioceratidae, Pakrioceras, Pseudancistroceras, Trocholitidae, Weberoceratidae
Subtaxa: Bentoceras Campbelloceras Centrotarphyceras Cycloplectoceras Eurystomites Falcilituites Moreauoceras Pilotoceras Pionoceras Planctoceras Rectanguloceras Seelyoceras Sweetoceras Tarphyceras
Ecology: fast-moving nektobenthic carnivore
Distribution:
• Aluoja of Estonia (3 collections)
• Chazyan of United States (3: New York, Vermont)
• Hunderum of Sweden (1)
• Arenig of United States (1: Oklahoma)
• Arenigian of United States (1: Virginia)
• Ordovician of Canada (11: Newfoundland, Newfoundland and Labrador, Quebec), Norway (5), the United Kingdom (1), United States (51: Alabama, Arkansas, Minnesota, Missouri, New York, Oklahoma, Pennsylvania, Texas, Utah, Vermont, Virginia)
Total: 77 collections including 110 occurrences