Plicatulidae

The Plicatulidae are a family of saltwater clams, marine bivalve mollusks, known commonly as kitten's paws or kittenpaws. These bivalves are related to oysters and scallops. The family has a single living genus, Plicatula, with a second, Harpax known from fossils.

Description
Plicatulidae are small, with weakly convex shells which are irregularly oval or even almost triangular. Typically, they attach themselves to a hard surface by the right valve. The ligament is internal and triangular.

Life cycle
Plicatulidae members start off in the larval stage.

Genera and species

 * Harpax Parkinson, 1811
 * Plicatula Lamarck, 1801
 * † Pseudoplacunopsis Bittner, 1895
 * Plicastulostrea onca: synonym of Plicatula australis Lamarck, 1819 (type by original designation); a species from Thailand
 * Synonyms:
 * Plicatulostrea Simone & Amaral, 2008 : synonym of Plicatula Lamarck, 1801
 * Spiniplicata [sic]: synonym of Spiniplicatula Habe, 1977: synonym of Plicatula Lamarck, 1801 (misspelling)
 * Spiniplicatula Habe, 1977 : synonym of Plicatula Lamarck, 1801