Parent taxon: Ceratitida according to M. Gómez-Luna et al. 1998
See also Astakhova 1971, Fantini Sestini 1996, Tatzreiter 1981, Tozer 1979, Tozer 1981 and Tozer 1994
Sister taxa: Anfaceras, Arcestina, Arcestoidea, Arctohungaritidae, Bajarunia, Caribouceras, Carteria, Ceratites whitneyi, Ceratitiaceae, Ceratitina, Ceratitoidea, Choristoceratoidea, Coeloceltites, Courtilloticeras, Cycloceratidae, Danubitoidea, Dinaritoidea, Eschericeratites, Glabrites, Glabrites involucrus, Haidingerites, Jeanbesseiceras, Larenites, Lobitaceae, Lobitina, Meekocerataceae, Meekoceratina, Megaphyllitina, Megaphyllitoidea, Metassuria, Nathorstitaceae, Noritoidea, Obrutchevites, Otoceratina, Otocerina, Owenitidae, Paraacrochordiceras, Paraceltitina, Paraganides, Paratibites, Pinacoceratoidea, Pinacocerina, Poporites, Proavites, Procurvoceratites, Proptychitina, Protoceras, Ptychitaceae, Ptychitina, Sagecerataceae, Stolleites, Subacerites, Tapponnierites, Trachyceratoidea, Tropitaceae
Subtaxa: Clionitidae Clydonitidae Heraclitidae Sandlingitidae Steinmannitidae Thetiditidae Tibetitidae
Type: Clydonites
Ecology: nektonic carnivore
Distribution:
• Triassic of Austria (1 collection), Canada (148: British Columbia, Nunavut, Yukon), China (13), Germany (1), Greece (1), Hungary (1), India (4), Indonesia (32), Israel (1), Italy (8), Laos (1), Malaysia (1), Mexico (4), Nepal (15), Oman (2), Peru (1), Romania (2), the Russian Federation (6), Svalbard and Jan Mayen (3), Tajikistan (1), Turkey (5), United States (14: Alaska, California, Nevada, Oregon), Vietnam (1)
Total: 266 collections including 515 occurrences