Alternative spellings: Orthocerataceae, Orthocerataceae
Parent taxon: Cephalopoda according to A. Pohle et al. 2022
See also Chen et al. 1981, Evans 1994, Evans 1996, Evans 2005, Kröger and Evans 2011 and Sweet 1964
Sister taxa: Actinoceratoidea, Akidocheilus, Ammonoidea, Anomalosaepiidae, Avramidiscus, Barrandeocerida, Belosaepia, Burronoceras, Coleoidea, Dartoceras, Davidiceras, Desmoceras, Didymoceras, Ectocochlia, Ellesmerocerida, Endoceratoidea, Endocycloceratidae, Erlangericheilus, Gonatocheilus, Hadrocheilus, Irianoceras, Lamellaptychus, Leptocheilus, Mesoteuthoidea, Multiceratoidea, Nautilia, Nautiloidea, Nautilus (Solenochilus), Ohioceratidae, Orthoceratoidea, Palaeoteuthis, Plectronoceratia, Plectronocerida, Rhyncholithes, Rhynchoteuthis, Robsonoceratidae, Scaptorrhynchus, Sichunoceras, Stemtonoceratidae, Tarphyceratia, Teratoceroides, Tetrabranchiata, Tillicheilus, Werthenoceras, Yanhecerida
Subtaxa: Actinocerida Dissidocerida Lituitida Offleyoceratidae Orthocerida Paraphragmitidae Protobactritidae Riocerida Slemmestadoceras
Ecology: fast-moving nektonic carnivore