Propeamussiidae, sometimes referred to as glass scallops mud scallops or mud pectens, are a taxonomic family of saltwater clams, marine bivalve molluscs in the order Pectinida.

Extant species are small in size, poorly known, and inhabit deep waters.

Valves of these animals are fragile, either equivalved or nearly so, small to medium-sized, and are described as subcircular to obscurely ovate in shape.

Like other scallops, the valves have pronounced "ears" on the anterior and posterior sides of the hinge joint.

The majority of fossils of this family are distributed throughout Europe and North America.