Matutidae

Matutidae is a family of crabs, sometimes called moon crabs,^[2] 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.^[3]

Matutidae Temporal range: Middle Eocene–Recent PreꞒ Ꞓ O S D C P T J K Pg N
Ashtoret lunaris, dorsal side
Male Ashtoret lunaris, ventral side
Scientific classification
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Malacostraca
Order:	Decapoda
Suborder:	Pleocyemata
Clade:	Reptantia
Infraorder:	Brachyura
Section:	Eubrachyura
Subsection:	Heterotremata
Superfamily:	Calappoidea
Family:	Matutidae De Haan, 1835 [1]
Genera
See text

Taxonomy

Traditionally, this taxon contained the single genus Matuta, and was considered a subfamily of the Calappidae.^[3] Now, the group is ranked as a family and six genera (four extant and two fossil) are now recognised.^[4] Although placed in the Calappoidea, it is not clear that Matutidae and Calappidae are closely related.^[5]

• 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

• 
  Ashtoret picta
• 
  Izanami curtispina
• 
  Matuta victor
• 
  Matuta planipes

Fossil record

Szaboa is known only from Hungarian fossil deposits of Middle Miocene age.^[6] Eomatuta was described from the Middle Eocene of Italy in 2009.^[7] Fossils of Ashtoret have also been found in Miocene deposits in Japan.^[6]