Upogebia onychion Williams, 1986

Wicksten, Mary K., 2012, Decapod Crustacea of the Californian and Oregonian Zoogeographic Provinces 3371, Zootaxa 3371, pp. 1-307 : 140-141

Upogebia onychion Williams, 1986

( Fig. 33A–E)

Upogebia onychion Williams, 1986a: 33 , fig. 12. — Sakai 2006: 74.

Diagnosis. Rostrum broadly triangular, pair of moderate subapical dorsal teeth followed by 2 teeth, central surface bearing tufts of setae, almost without teeth, merging with area of sparse spiniform tubercles and tubercles diminishing over anterodorsal carapace. Gastric region posterior to field of tubercles smooth. Cervical groove moderate, continuous, thalassinidean line continuing to posterior margin of carapace. Postocular margin bearing tooth. Antennular peduncle shorter than antennal peduncle. Second segment of antennal peduncle without subdistal ventral tooth. Scaphocerite moderate. Chelipeds nearly equal, moderately stout. Ischium with 1 small ventral spine, merus with 4 spines on ventral margin, subdistal dorsal spine, carpus with obsolescent teeth, 3–4 tiny teeth on anterodorsal margin, also teeth on distomedial, distoventral margins; palm of chela with rows of setae, dorsal crests low, without teeth; fixed finger stubby, with 1 or 2 teeth on cutting edge; dactyl slightly curved, with 1 low tooth on cutting edge. Pereopod 2 stout, without chela; merus with dorsal tooth, carpus with dorsal, ventral spines. Pereopods 3–5 smaller, setose, without teeth. Abdomen broad, pleura of first somite narrowly rounded psterolaterally, other pleura broadly rounded. Telson rectangular, with low lateral ridges, median groove obsolescent. Uropods with tiny tooth on protopod, endopod with 2 ribs, exopod with 3. Carapace length 7.2 mm.

Color in life. Not reported.

Habitat and depth. Among sand and rocks, 39 m.

Range. Known only from type locality, east of Cardwell Point , San Miguel I.