Clydonitaceae

The Clydonitaceae is a superfamily of generally costate (ribbed) tuberculate ceratitid ammonoids with smooth, grooved, or keeled venters and ceratitic or ammonitic sutures, that range throughout most of the Triassic.

Families in the Clydonitaceae include the


 * Clydonitidae


 * Clionitidae


 * Tibetitidae


 * Buchitidae


 * Choristoceratidae

The Trachyceratidae and Arpaditidae, once included are combined in the Trachycerataceae.