Trapeziidae

Not to be confused with Trapezidae.

Trapeziidae is a family of crabs, commonly known as coral crabs. All the species in the family are found in a close symbiosis with cnidarians. They are found across the Indo-Pacific, and can best be identified to the species level by the colour patterns they display.^[2] Members of the family Tetraliidae were previously included in the Trapeziidae, but the similarities between the taxa is the result of convergent evolution.^[3]

Trapeziidae
Trapezia tigrina
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Arthropoda
Class:	Malacostraca
Order:	Decapoda
Suborder:	Pleocyemata
Infraorder:	Brachyura
Section:	Eubrachyura
Subsection:	Heterotremata
Superfamily:	Trapezioidea
Family:	Trapeziidae Miers, 1886 [1]
Type genus
Trapezia Latreille, 1825

Subfamilies and genera

The World Register of Marine Species lists the following subfamilies and genera:^[1]

Calocarcininae Stevcic, 2005

• Calocarcinus Calman, 1909
• Philippicarcinus Garth & Kim, 1983
• Sphenomerides Rathbun, 1897

Quadrellinae Stevcic, 2005

• Hexagonalia Galil, 1986
• Hexagonaloides Komai, Higashiji & Castro, 2010
• Quadrella Dana, 1851

Trapeziinae Miers, 1886

• Trapezia Latreille, 1828