†order Actinocerida Teichert 1933 (mollusk)
Parent taxon: Orthoceratoidea according to A. Pohle et al. 2022
See also Chen et al. 1981, Crick 1981, Kröger 2008, Sepkoski 2002 and Teichert et al. 1964
Sister taxa: Dissidocerida, Lituitida, Offleyoceratidae, Orthocerida, Paraphragmitidae, Protobactritidae, Pseudorthocerida, Riocerida, Slemmestadoceras
Subtaxa: Actinoceratidae Armenoceratidae Astoceras Calhounoceras Carbactinoceratidae Eldroceras Georginidae Gonioceratidae Gouldoceratidae Greenlandoceratidae Hopeioceras Huroniidae Jeholoceras Kobayashiceras Meitanoceratidae Ormoceratidae Parahelenites Parahelenitidae Polydesmiidae Pseudactinoceratidae Ruedemannoceratidae Subtofangoceras Wutinoceratidae Zerashanoceras
Ecology: nektobenthic carnivore