Pinnixa longipes (Lockington, 1877)

Wicksten, Mary K., 2012, Decapod Crustacea of the Californian and Oregonian Zoogeographic Provinces 3371, Zootaxa 3371, pp. 1-307 : 252-254

Pinnixa longipes (Lockington, 1877)

( Fig. 58C)

Tubicola longipes Lockington, 1877c: 55 .

Pinnixa longipes . — Holmes 1900: 92. — Rathbun 1904: 188; 1917: 137, figs. 80, 81. — Weymouth 1910: 58, text fig. 6. — Schmitt 1921: 257, text fig. 152. — Johnson & Snook 1927: 392, fig. 348. — Schmitt et al. 1973: 113. — Garth & Abbott 1980: 617, fig. 25.38. — Ricketts et al. 1985: 307, fig. 238. — Zmarzly 1992: 695, fig. 10. — Campos-Gonzalez 2007: 645, pl. 322 B1.

Diagnosis. Carapace more than twice as long as wide, with acute lateral angle, somewhat flattened, with transverse depression behind gastric area. Frontal area concave, dissected by deep longitudinal groove. Anterolateral region smooth, rarely with weakly granulate ridge. Body entirely surrounded by fringe of long plumose setae. Chelipeds small, short, setose; chelae stout, those of mature male more robust than female.Inner margin of dactyl with single triangular tooth; inner margin of fixed finger irregularly serrated. Gape present when fingers closed.Anterior face of propodus with tubercles just above ventral margin. Pereopods 2, 3 slender, similar; with long, slender, nearly straight dactyls nearly equal to length of propodi. Pereopod 4 enormously developed relative to other legs. Posterovental margin of ischium tuberculate. Dorsal margin of merus smooth to serrate, posteroventral margin of merus denticulate, produced as shelf. Ventral margin of propodus granulate. Dactyl short, thick. Pereopod 5 short, not reaching end of merus of pereopod 4, slender, more stout than pereopods 2, 3; dactyl short, stout. Carapace length 3.2 mm.

Color in life. Pale brownish to yellowish white; see color photograph by Garth & Abbott (1980: fig. 25.37).

Habitat and depth. Sandy sediments, living with polychaete worms Axiothella rubrocincta , Pectinaria californiensis Hartman, 1941 ; P. granulata (Linnaeus, 1757) ; and Pista elongata Moore, 1909 ; rarely echiurans; intertidal zone to 128 m. In southern California, common at 45 m.

Range. Bodega Bay , California to Ensenada, Baja California, Mexico. Type locality Tomales Bay, California .