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, Rioceratida, Slemmestadoceras, Orthoceras triadicum, Orthoceras acum, Orthoceras blakei, Orthoceras mojsisovicsi, Orthoceras austriacum, Orthoceras subtiliseptatum, Orthoceras pulchristriatum, Orthoceras rotundulum, Orthoceras billiemense, Orthoceras sandlingense, Orthoceras shastense, Orthoceras baconicum, Orthoceras pulchellum, Orthoceras celticum, Orthoceras multilabiatum, Orthoceras subellipticum, Orthoceras styriacum, Orthoceras spitiense, Orthoceras nodosum, Orthoceras lennaense, Pseudorthocerida, Orthoceras increscens, Orthoceras indoaustralicum, Orthoceras variestriatum, Orthoceras lateseptatum
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