Matutidae

Matutidae is a family of crabs, sometimes called moon crabs, adapted for swimming or digging. They differ from the swimming crabs of the family Portunidae in that all five pairs of legs are flattened, rather than just the last pair, as in Portunidae. Crabs in the Matutidae are aggressive predators.

==Taxonomy== Traditionally, this taxon contained the single genus Matuta, and was considered a subfamily of the Calappidae. Now, the group is ranked as a family and six genera (four extant and two fossil) are now recognised. Although placed in the Calappoidea, it is not clear that Matutidae and Calappidae are closely related. Ashtoret Galil & P. F. Clark, 1994 † Eomatuta De Angeli & Marchiori, 2009 Izanami Galil & P. F. Clark, 1994 Matuta Weber, 1795 Mebeli Galil & P. F. Clark, 1994 † Szaboa Müller & Galil, 1998