Parent taxon: Mollusca according to J. P. Smith 1927
See also Giribet et al. 2006, Martin 1904, Sepkoski 2002, Squires 1984 and Wells and Houston 2001
Sister taxa: Acaenoplax, Acevina, Actinoconus, Aculopileus, Acutirostriconus, Aldanolina, Algomella, Anisomyaria, Aplacophora, Aulacotrochus, Aviculocephaloconus, Bagenoviella, Beroides, Bisulcus, Bivalvia, Calyptoptomatida, Cambroscutum, Caudofoveata, Centriconus, Chiton cottae, Codonoconus, Conchifera, Conchula, Corystos, Crestoconus, Cyrtostoma, Dingus, Diplacophora, Dysmea, Dysnoetopla, Ebianella, Eosoconus, Gastropoda, Granoconus, Gutticonus, Hamatoconus, Helcionelloida, Hemithecellitina, Huangshandogoconus, Huangshandongoconus, Kaschkadakia, Katunioides, Kepinospira, Khairkhaniidae, Khairkhaniiformes, Kraikchania, Kuanchuanella, Ladamarekiidae, Laticonus, Liantuoconus, Ligyrokala, Mackenziella, Maikhanellidae, Makarakia, Merismoconcha, Minymerisma, Miozonites, Nothamusium, Odontogriphus, Omalenlina, Palaeacmaea, Paragastropoda, Parascenella, Patelliconidae, Peotoconus, Pichynella, Polytropis, Porcaconus, Proconus, Protodrepanostoma, Pseudomatthevia, Rostroconchia, Sachitida, 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 Anomalosaepiidae Ascocerida Ausseites Avramidiscus Bactritoidea Barrandeocerida Belosaepia Boletzkida Botellusoceras Burronoceras Coleoidea Conchorhynchus Cyrtoceras Dartoceras Davidiceras Desmoceras Didymoceras Discosorida Ellesmerocerida Endoceratoidea Endocerida Endocycloceratidae Erlangericheilus Gonatocheilus Hadrocheilus Heyuncunoceras Kailiceras Kotetishvilia Lamellaptychus Leptocheilus Leurocycloceratinae Mesoteuthoidea Michelinoceratinae Nautiloidea Nautilus (Solenochilus) Ohioceratidae Oncocerida Orthoceratoidea Orthoceratoidea Orthodochmioceras Palaeoteuthis Plectonocerida Protactinocerida Pseudorthocerida Rhynchoteuthis Rhyncolites Robsonoceratidae Scaptorrhynchus Sichunoceras Songkanoceras Stemtonoceratidae Tarphycerida Teratoceroides Tetrabranchiata Tillicheilus Toxancyloceras Werthenoceras Yanhecerida Yannanoceras Yichangoceras
Ecology: fast-moving nektonic carnivore