Petrolisthes manimaculis Glassell, 1945

Wicksten, Mary K., 2012, Decapod Crustacea of the Californian and Oregonian Zoogeographic Provinces 3371, Zootaxa 3371, pp. 1-307 : 159

Petrolisthes manimaculis Glassell, 1945

( Fig. 37D)

Petrolisthes manimaculis Glassell, 1945: 223 , text fig. 1. — Haig 1960: 77, pl. 27, fig. 1; see this reference for previous misidentifications. — Haig & Abbott 1980: 587, fig. 24.16. — Jensen 1995: 75, fig. 151. — Wasson et al. 2002: 482. — Kuris et al. 2007: 648.

Diagnosis. Front triangular, with deep median groove. Carapace slightly longer than wide, somewhat granular. Chelipeds finely to roughly granular. Merus with strongly projecting lobe on anterior margin. Carpus 2.5–3 times as long as wide, margins subparallel. Chela naked, fingers long, slender; gape with thick pubescence. Pereopods 2–4 smooth to granular; merus not inflated; all segments covered with scattered tufts of setae. Carapace length to 20 mm.

Color in life. Ground color chocolate brown, row of blue dots on median longitudinal ridge of palm of chela, red spot at base of dactyl of chela ( Haig 1960)..

Habitat and depth. Among rocks and in piles of rocky rubble, lowest intertidal zone to at least 2 m.

Range. Baker Beach and Indian Beach, Humboldt County, California to Punta Eugenia , Baja California, Mexico. Type locality Morro Bay , California .

Remarks. This species is common in shallow subtidal rock piles along Santa Catalina I. , California. It has been confused with P. gracilis Stimpson, 1860 ; which occurs in the Gulf of California.