Cephalopoda - Multiceratoidea - Apsidoceratidae
Parent taxon: Multiceratoidea according to A. Pohle et al. 2022
See also Crick 1981, Frye 1982, Strand 1934 and Teichert et al. 1964
Sister taxa: Apocrinoceratidae, Ascocerida, Bassleroceratidae, Clinoceratidae, Cyclostomiceratidae, Cyrtocerinida, Discosorida, Oncocerida, Tarphycerida, Uranoceratidae
Subtaxa: Apsidoceras Charactoceras Chidleyenoceras Deckeroceras Fremontoceras Kinaschukoceras Wilsonoceras
Ecology: fast-moving nektonic carnivore
Distribution:
• Ordovician of Canada (26: Manitoba, Newfoundland and Labrador, Northwest Territories, Nunavut, Quebec collections), Estonia (2), Greenland (1), Norway (5), Sweden (5), the United Kingdom (5), United States (19: Colorado, Illinois, Iowa, Wisconsin, Indiana, Indiana, Ohio, Iowa, Iowa, Minnesota, Minnesota, New York, Ohio, South Dakota, Wyoming)
Total: 63 collections including 84 occurrences