Neotrypaea gigas (Dana, 1852)

Wicksten, Mary K., 2012, Decapod Crustacea of the Californian and Oregonian Zoogeographic Provinces 3371, Zootaxa 3371, pp. 1-307 : 134-135

Neotrypaea gigas (Dana, 1852)

( Fig. 31H)

Callianassa gigas Dana, 1852: 19 . — Holmes 1900: 162. — Rathbun 1904: 154. — Schmitt 1921: 119, fig. 80. — Haig & Abbott 1980: 579. — Hart 1982: 56, fig. 14. — Sakai 2005: 57.

Callianassa longimana Stimpson, 1857a: 86 . — Rathbun 1904: 154. — Schmitt 1921: 117, fig. 79. — Johnson & Snook 1927: 329, fig. 276. — Wicksten 1980c: 360.

Neotrypaea gigas . — Manning & Felder 1991: 771. — Kuris et al. 2007: 648, pl. 326 H. — Campos-Gonzalez et al. 2009: 1249, fig. 2 g, h; fig. 3 b, fig. 4 b–d. — Pernet et al. 2010: 323, fig. 2.

Diagnosis. Rostrum usually bluntly rounded, rarely acute. Eyestalk with acute, divergent apices, pigmented area behind middle of stalk. Carapace smooth, with cervical, lateral grooves. Third maxillipeds operculiform. First pereopods chelate, unequal, sexually dimorphic. Male major cheliped almost as long as rest of body, merus with large lobe near base, dorsal, ventral margins of carpus, palm relatively straight, chela elongate, usually without gape between propodus, dactyl when closed. Large cheliped of female, immature male with hand longer than carpus. Small cheliped in both sexes elongate, carpus, hand subequal. Pereopod 2 chelate, palm wide. Pereopods 3–5 flattened, modified for digging, with simple dactyls. Male with vestigial pleopod 1, none on second abdominal somite; pleopods 3–5 well developed. Female with uniramous first pleopods, biramous second pleopods. Telson subrectangular, with pair dorsal ribs. Uropods as long as or longer than telson, exopod with dorsal rib. Male total length 150 mm, female 106 mm.

Color in life. Mostly ivory to cream, abdomen flesh-colored dorsally. Hart (1982) gave a detailed description of the color.

Habitat and depth. Mud or sandy mud, intertidal zone to 50 m.

Range. Digby I., British Columbia to San Quentin Bay , Baja California, Mexico. Type locality Puget Sound .