Parent taxon: Endocerida according to C. Teichert et al. 1964
Sister taxa: Allotrioceratidae, Bisonoceras, Botryceras, Cacheoceras, Chaohuceras, Chihlioceratidae, Chisiloceras, Choreanoceroides, Dartonoceras, Disphenoceras, Emmonsoceratidae, Endoceratidae, Eocameroceras, Farroceras, Hoyoceras, Humeoceratidae, Ignoceras, Juaboceras, Kiotoceras, Kugeloceras, Lobocyclendoceras, Manchuroceratidae, Najaceras, Palaeocyclendoceras, Paracyclendoceras, Perkinsoceras, Piloceratidae, Pronajaceras, Proterocameroceratidae, Protocyclendoceras, Rossicoceras, Schmidtoceras, Sewardoceras, Telleroceras, Thylacoceratidae, Trinitoceras, Ventrolobendoceras, Williamsoceras, Winstonoceras, Yorkoceras
Subtaxa: Cyclocyrtendoceras, Cyrtendoceras, Cyrtovaginoceras
Ecology: nektobenthic carnivore