Cephalopoda - Ascocerida - Ascoceratidae
Parent taxon: Ascocerida according to B. Kröger 2013
See also Crick 1981, Frye 1982 and Teichert et al. 1964
Sister taxa: Hebetoceratidae, Linstroemoceras, Probillingsitidae
Subtaxa: Ascoceras Ascoceratinae Billingsites Schuchertoceras Shamattawaceras
Ecology: fast-moving nektobenthic carnivore
Distribution:
• Niagaran of United States (1: Indiana collection)
• Silurian of Sweden (5), the United Kingdom (1), United States (1: Wisconsin)
• Ordovician to Silurian of Canada (3: Québec)
• Ordovician of Canada (17: Manitoba, Northwest Territories, Ontario, Quebec, Québec), Norway (5), Sweden (3), the United Kingdom (1), United States (10: Illinois, Iowa, Wisconsin, Indiana, Michigan, Minnesota, Ohio, Tennessee)
Total: 47 collections including 75 occurrences