Pilumnus spinohirsutus (Lockington, 1877)

Wicksten, Mary K., 2012, Decapod Crustacea of the Californian and Oregonian Zoogeographic Provinces 3371, Zootaxa 3371, pp. 1-307 : 244

Pilumnus spinohirsutus (Lockington, 1877)

( Fig. 55G, Pl. 14F)

Acanthus spino-hirsutus Lockington, 1877a: 32 . Pilumnus spino-hirsutus . — Holmes 1900: 67. Pilumnus spinohirsutus . — Rathbun 1904: 185, pl. 7, fig. 2; 1930: 503, pl. 203. — Schmitt 1921: 247, pl. 37, fig. 10.— Johnson

& Snook 1927: 389, fig. 345. — Garth & Abbott 1980: 611, fig. 25.29. — Ricketts et al. 1985: 172, fig. 143. — Jensen

1995: 18, fig. 4.

Diagnosis. Carapace strongly convex, covered with stiff setae; median frontal lobes truncated, separated by prominent notch; each frontal lobe armed with 4 or 5 spines; orbits armed with strong spines; 5 anterolateral spines. spines. Chelipeds unequal, setose, carpus with spines, hand with several series of spines, fingers dark colored. Carapace length 25.4 mm.

Color in life. Pale brown, red, golden brown. Transverse ridge in front of mouth area with bright red tint. The color notes are from crabs from Redondo Beach and San Pedro, Los Angeles County, California.

Habitat and depth. Among rocks or tube mollusks, tide pools, breakwaters, harbors; intertidal zone to 25 m.

Range. Venice, Los Angeles County, California to Magdalena Bay, Baja California . Type locality San Diego , California .

Remarks. This crab usually is well hidden under rocks or in holes. It seems to prefer warmer waters. It is common near outlets of a power plant in King Harbor at Redondo Beach, California.