See text Praenuculidae is an extinct family of prehistoric bivalves in the superfamily Nuculoidea.

[2] Species in this family are thought to have been sessile, attached to the substrate in shallow infaunal marine water environments, where they formed shells of an aragonite composition.

[3] The family is composed of up to seventeen genera, most divided between the two described subfamilies erected by Teresa M. Sánchez in 1999.

[4] The structure of the chevroned hinge teeth is the dominant feature by which members of Praenuculidae are divided between the two subfamilies.

It was suggested by John C. Cope in 1997 that the genus may belong elsewhere in the subclass Protobranchia,[1] formerly called Palaeotaxodonta.