Parent taxon: Ammonoidea according to J. Klein et al. 2007
Sister taxa: Aequiloboidea, Agoniatitida, Ammonites hercules, Ammonites ludovicus, Ammonitida, Aptychus, Aulicostephanidae, Ceratitida, Clymeniida, Cornaptychus, Egrabensiceras, Ellipsolithes, Epimayites, Eubranoceras, Farbesiceras, Forbescieras, Globites, Gomimonomeroceras, Goniatitida, Laevaptychus, Laevicornaptychus, Lenticeratidae, Lilinthiceras, Lytoceratida, Lytocerida, Medlicottiida, Orbulites, Pelagus, Phylloceratida, Phylloceratitida, Phyllocerida, Planulites, Praeglyphioceratida, Prolecanitida, Pronoritida, Proplanulitidae, Psiloceratida, Punctaptychus, Rugaptychus, Sidetes, Spinaptychus, Tornoceratida, Tornocerida, Trachyceratina, Tropitoidea, Yokoyamaceras
Subtaxa: Hamulinidae Macroscaphitidae Megacrioceratidae
Ecology: fast-moving nektonic carnivore
Distribution:
• Cretaceous of Bulgaria (1 collection), Canada (1: British Columbia), Chile (8), Colombia (1), the Czech Republic (1), Egypt (2), France (14), Georgia (1), Hungary (5), Italy (7), Japan (2), Mexico (9), Mozambique (1), Serbia and Montenegro (7), Slovakia (2), South Africa (1), Spain (77), Trinidad and Tobago (1), Tunisia (2), United States (16: California, Oregon), Venezuela (1)
Total: 160 collections including 194 occurrences