Invalid subtaxa: Leurocycloceratinae Sweet 1964 [invalid subgroup], Michelinoceratinae Flower 1945 [invalid subgroup], Ohioceratidae Shimizu and Obata 1936 [invalid subgroup]
Parent taxon: Mollusca according to J. P. Smith 1927
Sister taxa: Acaenoplax, Acevina, Actinoconus, Aculopileus, Acutirostriconus, Aldanolina, Algomella, Anisomyaria, Aplacophora, Asperoconus, Aviculocephaloconus, Bagenoviella, Beroides, Bisulcus, Bivalvia, Calyptoptomatida, Cambroscutum, Caudofoveata, Centriconus, Codonoconus, Conchifera, Conchula, Corystos, Crestoconus, Cyrtostoma, Dingus, Diplacophora, Dysnoetopla, Ebianella, Eosoconus, Gastropoda, Granoconus, Gutticonus, Hamatoconus, Helcionelloida, Hemithecellitina, Huangshandogoconus, Huangshandongoconus, Hubeinella, Hyolitha, Kaschkadakia, Katunioides, Kepinospira, Khairkhaniidae, Khairkhaniiformes, Kraikchania, Kuanchuanella, Ladamarekiidae, Laticonus, Liantuoconus, Ligyrokala, Mackenziella, Macroscenella, Maikhanellidae, Makarakia, Merismoconcha, Minymerisma, Nothamusium, Odontogriphus, Omalenlina, Orthoconus, Palaeacmaea, Paragastropoda, Parascenella, Patelliconidae, Peotoconus, Pichynella, Polytropis, Porcaconus, Proconus, Pseudomatthevia, Rostroconchia, Sargaella, Scamboscamna, Scaphopoda, Scenellopsis, Serialia, Shabaktiella, Sichuanospira, Sinuconus, Solandangella, Solenogastres, Songlingella, Spatuloconus, Stenothecella, Stenothecoida, Sulcocarina, Tentaculita, Tergomya, Trunctoconus, Tuberoconus, Xilingxiaconus, Xinnanospira, Yangtzemerisma
Subtaxa: Actinoceratoidea, Actinocerida, Actinodochmioceras, Akidocheilus, Ammonoidea, Arkonoceras, Aulacocerida, Ausseites, Avramidiscus, Bactritoidea, Balticoceras, Belemnitida, Belopeltis, Belosaepia, Boletzkida, Botellusoceras, Burronoceras, Coleoidea, Conchorhynchus, Dartoceras, Davidiceras, Deltoceratidae, Desmoceras, Discosorida, Dissimilites, Endoceratoidea, Endocycloceratidae, Eotripteroceras, Erlangericheilus, Gonatocheilus, Hadrocheilus, Hesperoceras, Heyuncunoceras, Kailiceras, Kotetishvilia, Lamellaptychus, Leptocheilus, Lituitida, Mesoteuthoidea, Nautilida, Nautiloidea, Neptunoceratidae, Oncocerida, Orthoceratina, Orthoceratoidea, Orthodochmioceras, Palaeoteuthis, Paratrematoceras, Patruliusiceras, Plectonocerida, Protactinocerida, Pseudorthocerida, Rhyncholite, Rhynchoteuthis, Robsonoceratidae, Sabbaiceras, Scaptorrhynchus, Sichunoceras, Sinoceras, Songkanoceras, Spirulirostridae, Stemtonoceratidae, Tarphycerida, Tetrabranchiata, Tillicheilus, Toxancyloceras, Werthenoceras, Yanhecerida, Yannanoceras, Yichangoceras
Ecology: fast-moving nektonic carnivore