Alternative spelling: Ascoceratida
Parent taxon: Multiceratoidea according to A. Pohle et al. 2022
See also Crick 1981, Frye 1982, King and Evans 2019, Kröger 2013, Mutvei 2013, Sepkoski 2002 and Teichert et al. 1964
Sister taxa: Apocrinoceratidae, Apsidoceratidae, Bassleroceratidae, Clinoceratidae, Cyclostomiceratidae, Cyrtocerinida, Discosorida, Oncocerida, Tarphycerida, Uranoceratidae
Subtaxa: Ascoceratidae Hebetoceratidae Linstroemoceras Probillingsitidae
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)
• Chazyan of United States (3: New York)
• Ordovician to Silurian of Canada (3: Québec)
• Ordovician of Canada (24: Manitoba, Northwest Territories, Nunavut, Ontario, Quebec, Québec), Estonia (1), Norway (7), Sweden (3), the United Kingdom (2), United States (43: Colorado, Illinois, Iowa, Wisconsin, Indiana, Indiana, Ohio, Iowa, Iowa, Minnesota, Michigan, Minnesota, New York, Ohio, Tennessee)
Total: 94 collections including 164 occurrences