Chorilia longipes Dana, 1851

Wicksten, Mary K., 2012, Decapod Crustacea of the Californian and Oregonian Zoogeographic Provinces 3371, Zootaxa 3371, pp. 1-307 : 220

Chorilia longipes Dana, 1851

( Fig. 50H, Pl. 12D)

Chorilia longipes Dana, 1851: 269 . — Rathbun 1904: 174; 1925: 203, pl. 224, figs. 1–3. — Weymouth 1910: 33, pl. 6, fig. 16. — Schmitt 1921: 209, text fig. 130. — Garth 1958: 263, pl. P, figs 45; pl. 30. — Hart 1982: 180, fig. 71. — Jensen 1995: 2, fig. 19.

Hyastenus (Chorilia) longipes . — Holmes 1900: 33.

Chorilia longipes turgida Rathbun, 1924: 3 . — Garth 1958: 263. — Wicksten 1980c: 363. — Hendrickx 1999: 120, fig. 69, pl. 6A.

Diagnosis. Rostrum almost half as long as remainder of carapace, horns tapering. Carapace covered by numerous tubercles and spines; largest spine at widest part of carapace at margin of branchial region; 2 median gastric spines, ridge or tubercle on hepatic region. Slender preorbital spine. Basal antennal segment with 2 spines on outer margin, followed posteriorly by triangular tooth. Chelipeds massive; merus rough and with spines and tubercles; carpus also rough, hand compressed, upper edge thin, finger narrow, gaping in male; dactyl with sub-basal tooth, distal ends of fingers meeting. Pereopods 2 about as long as chelipeds, pereopods 3–5 shorter; merus of each with short sharp point; dactyls slender, curved. Male carapace length 50.4 mm, width 30.2 mm; female 54 mm, width 40 mm.

Color in life. White to reddish or dirty brown. The color notes are from crabs from Monterey Bay , California .

Habitat and depth. Among boulders or on mud, 33–1200 m, usually found at greater depths toward southern end of range.

Range. Off Shumagin Bank , Alaska to Cortez Bank, California; northern Peru. Type locality "Oregon territory.”

Remarks. Three subspecies are recognized. Of these, C. longipes japonica ( Miers, 1879) is reported from temperate waters of the western Pacific, in Japan from Tohoku province south to Sagami Bay and the Korean Channel ( Sakai 1965). Chorilia longipes longipes Dana has a blunt ridge on the hepatic region; C. longipes turgida Rathbun has a spine on the hepatic region. Chorilia longipes longipes occurs from Alaska to off Santa Catalina I. , California; C. longipes turgida had been found from Monterey Bay to off San Diego. The distribution of the typical form seems to be related to colder water temperatures, for the occurrence of this form toward the south is related to zones of upwelling ( Garth 1958). Water temperatures either were not reported at all or were reported at the surface when most of these crab specimens were collected. It would be useful to perform a more rigorous correlation analysis between the shape of the hepatic protrusion and the water temperature and geographical location of collection. The geographical distribution of the two supposed subspecies overlaps, so they may in fact be ecophenotypes instead of reproductively isolated populations.