Latreille, 1825
Carapace trapezoidal in outline. Posterior margin notably shorter than the front. Frontal margin sinuous, divided into four lobes or teeth with a rounded apex and separated by a conspicuous antennal furrow from the supero-internal orbital angle that is rounded. Basal antennal article straight and situated outside the orbital hiatus that is closed. The two chelipeds subequal or slightly unequal, but generally of the same form; anterior margin of the merus dentate. Ambulatory legs not noticeably short nor stout; merus of P4 with its length equal or greater than twice the width. Male abdomen with segments 3-5 fused. Commensal crabs associated with corals. (Guinot 1998)
Type species: Trapezia ferruginea Latreille, 1828.
Species treated:
Trapezia cheni Galil, 1983
Trapezia cymodoce (Herbst, 1801)
Trapezia digitalis Latreille, 1828
Trapezia ferruginea Latreille, 1828
Trapezia flavopunctata Eydoux & Souleyet, 1842
Trapezia formosa Smith, 1869
Trapezia garthi Galil, 1983
Trapezia guttata Rüppell, 1830
Trapezia lutea Castro, 1997
Trapezia rufopunctata (Herbst, 1799)
Trapezia septata Dana, 1852
Trapezia serenei Odinetz, 1984
Trapezia speciosa Dana, 1852
Trapezia tigrina Eydoux & Souleyet, 1842