Alternative spelling: Ascoceratida
Parent taxon: Multiceratoidea according to A. Pohle et al. 2022
See also Crick 1981, Frye 1982, 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)
• 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)
• Chazy of United States (3: New York)
Total: 94 collections including 164 occurrences