Pinnixa franciscana Rathbun, 1917

Wicksten, Mary K., 2012, Decapod Crustacea of the Californian and Oregonian Zoogeographic Provinces 3371, Zootaxa 3371, pp. 1-307 : 250-252

Pinnixa franciscana Rathbun, 1917

( Fig. 57K, L)

Pinnixa franciscana Rathbun, 1917: 161 , pl. 35, figs. 1–4, text fig. 100. — Schmitt 1921: 263, pl. 42, figs. 1–4. — Schmitt et al. 1973: 110. — Garth & Abbott 1980: 671, fig. 25.38. — Ricketts et al. 1985: 307, fig. 238. — Zmarzly 1992: 687, fig. 7. — Campos- Gonzalez 2007: 646, pl. 325 A3.

Diagnosis. Carapace about twice as wide as long, pitted, with blunt, straight cardiac ridge; granulate ridge running from orbit to branchial region. Palm of chela densely granulate, with ridge just above lower edge continued to end of fixed finger, finger fringed with setae, line of granules through middle. Fingers wide, slightly gaping, apices crossing, dactyl with large triangular tooth, fixed finger also with tooth. Dactyls of pereopods 2–5 slender. Pereopod 2 reaching middle of dactyl of pereopod 3. Pereopod 4 much larger than others, with dorsal margin of merus, carpus, propodus serrate; ventral margin of merus also serrate. Pereopod 5 setose, reaching middle of carpus of pereopod 4. Female carapace length 5.7 mm.

Color in life. Dirty brown to golden brown. The color notes are from crabs from Princeton Harbor, San Mateo County, California .

Habitat and depth. Sandy mud, symbiotic with echiurans, polychaetes, callianassid shrimp; intertidal zone to 47 m.

Range. San Francisco Bay, California to Turtle Bay, Baja California. Type locality east of Point San Quentin , San Francisco Bay (Albatross sta. D5709) .