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