Alternative spellings: Orthocerataceae, Orthocerataceae
Parent taxon: Cephalopoda according to B. Kröger and D. H. Evans 2011
Sister taxa: Actinoceratoidea, Actinocerida, Actinodochmioceras, Akidocheilus, Ammonoidea, Aulacocerida, Ausseites, Avramidiscus, Bactritoidea, Belemnitida, Belopeltis, Belosaepia, Boletzkida, Botellusoceras, Burronoceras, Coleoidea, Conchorhynchus, Dartoceras, Davidiceras, Deltoceratidae, Desmoceras, Discosorida, Dissimilites, Endoceratoidea, Endocycloceratidae, Erlangericheilus, Gonatocheilus, Hadrocheilus, Heyuncunoceras, Kailiceras, Kotetishvilia, Lamellaptychus, Leptocheilus, Lituitida, Mesoteuthoidea, Nautilida, Nautiloidea, Neptunoceratidae, Oncocerida, Orthoceratina, Orthodochmioceras, Palaeoteuthis, Patruliusiceras, Plectonocerida, Protactinocerida, Pseudorthocerida, Rhyncholite, Rhynchoteuthis, Robsonoceratidae, Sabbaiceras, Scaptorrhynchus, Sichunoceras, Songkanoceras, Spirulirostridae, Stemtonoceratidae, Tarphycerida, Tetrabranchiata, Tillicheilus, Toxancyloceras, Werthenoceras, Yanhecerida, Yannanoceras, Yichangoceras, Paratrematoceras, Balticoceras, Arkonoceras, Eotripteroceras, Hesperoceras, Sinoceras
Subtaxa: Brachycycloceratidae, Dissidocerida, Offleyoceratidae, Orthocerida, Paraphragmitidae, Sactorthoceratidae, Slemmestadoceras
Ecology: fast-moving nektonic carnivore