Ceratitidae

The Ceratitidae is a family of middle Triassic ammonoid cephalopods included in the ceratitid superfamily Ceratitaceae characterized by evolute to involute shells that are generally highly ornaments with ribs and tubercles and have venters (outer rims) that very from flat to moderately keeled.

The Ceratitidae have been divided into three subfamilies, the Ceratitinae with Acanthoceratites, Alloceratites, Ceratites, Discoceratites, and Progonoceratites, the Nevaditinae with such as Alkaites, Chieseiceras, Detoniceras, and Nevadites, and the Paraceratinae that includes such genera as Ceccaceras, Kellnerites, Paraceratites, and Semiornites.

Distribution is world wide.