Clydonitidae

The Clydonitidae comprises a family of ceratitid Ammonoidea from the uppper Triassic within the Clydonitaceae that includes Clydonites and Sandlingites.

Shells are generally evolute -all whorls exposed- with fine, dense, irregularly granular ribs, and a median ventral groove along the outer margin. Sutures goniatitic to weakly ceratitic.