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(Lamarck, 1818)

Carapace glabrous; transverse granular lines on frontal, protogastric, and mesogastric regions, epibranchial line interrupted only at the cervical groove; front with six triangular teeth; antero-lateral borders with 7 acute teeth, second and fourth very much smaller than the remainder, fifth the largest; postero-lateral junctions rounded. Antennal flagellum excluded from orbit. Cheliped merus with 3 strong spines on anterior border, posterior border granulate; carpus with a strong internal spine, outer border with 3 spinules; palm with 4 spines on upper border. Merus of swimming leg with a strong subdistal posterior spine, propodus with about 10 denticles on posterior border. (Türkay 1995)

Antennal flagellum excluded from orbital hiatus, basal antennal joint with single obtuse tooth; frontal teeth obtusely triangular; posterior border of cephalothorax curved, forming curved postero-lateral junction; 5 large and 2 or 3 very small antero-lateral teeth; no transverse ridges on carapace behind epibranchials. (Davie 1999)

Type locality: Australia.
Range: Red Sea; Madagascar - (Leene, 1938), Toliara (Crosnier, 1962); Mauritius (Michel, 1964); Amirante Islands (Rathbun, 1911); Chagos Archipelago - Salomon Island (Rathbun, 1911), Diego Garcia (Stephenson, 1976); Japan - Northern Daito-jima (Sakai, 1939), Hachijo-jima, Yoron-jima, and Daito-jima (Sakai, 1976a); Taiwan; Indonesia - Maluku; Australia (Lamarck, 1818); Hawaiian Islands - Hawaii, Oahu and Kauai (Rathbun, 1906); Marquesas Islands (Leene, 1938, Stephenson, 1976); Tahiti; Tuamotu Archipelago - Makatea (Sendler, 1923, Leene, 1938); shallow waters.

Rainbow swimming crab (Charybdis erythrodactyla)