†order Actinocerida Teichert 1933 (mollusk)
Parent taxon: Orthoceratoidea according to A. Pohle et al. 2022
See also Chen et al. 1981, Crick 1981, King and Evans 2019, Kröger 2008, Sepkoski 2002 and Teichert et al. 1964
Sister taxa: Dissidocerida, Lituitida, Offleyoceratidae, Orthocerida, Paraphragmitidae, Protobactritidae, 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