Callinectes arcuatus Ordway, 1863

Wicksten, Mary K., 2012, Decapod Crustacea of the Californian and Oregonian Zoogeographic Provinces 3371, Zootaxa 3371, pp. 1-307 : 235

Callinectes arcuatus Ordway, 1863

( Fig. 55A)

Callinectes arcuatus Ordway, 1863: 578 . — Rathbun 1930: 121, pl. 52, text figs. 15h, 16h, 17f, 18g. — Garth & Stephenson 1966: 43, pl. V, fig. A; pl. VIII, fig. A; pl. X, fig. A; pl. XII, fig. D. — Garth & Abbott 1980: 603, fig. 25.15. — Jensen 1995: 32, fig. 47.

Diagnosis. Carapace with surface moderately finely granulate, regions well marked. Front with 4 triangular teeth, orbital region with inner supraorbital lobes square-cut, inner supraorbital fissure closed, suborbital tooth prominent. Anterolateral teeth stout, first 4 blunt; 5–7 sharp, tooth 8 very sharp, tooth 9 moderately long. Cheliped with carina of hand granular. Pereopod 5 with swimming paddle. Male carapace length to 51.3 mm, female to 43.3 mm.

Color in life. Carapace olive gray-green, chelipeds olive green dorsally, whitish ventrally, apices yellowbrown; legs turquoise with olive stain, setae golden; fifth legs olive green with turquoise tints, paddles with black stain ( Garth & Stephenson 1966).

Habitat and depth. Bays and estuaries, sand, mud or shell bottoms, intertidal zone to 28 m.

Range. Los Angeles Harbor , California to off Puerto Pizarro, Peru. Type locality Cape San Lucas .

Remarks. In California, scattered populations have been reported in recent years at Anaheim Slough and in San Diego County.