Betaeus ensenadensis Glassell, 1938

Wicksten, Mary K., 2012, Decapod Crustacea of the Californian and Oregonian Zoogeographic Provinces 3371, Zootaxa 3371, pp. 1-307 : 63

Betaeus ensenadensis Glassell, 1938

( Fig. 15E, F, I, M, N)

Betaeus ensenadensis Glassell, 1938: 416 . — Hart 1964: 445, figs. 23–25, 28, 35–36, 43–45. — MacGinitie & MacGinitie 1968: 270. — Word & Charwat 1976: 47. — Chace & Abbott 1980: 569. — Wicksten 1984a: 187.

Diagnosis. Front of carapace slightly curved, depressed anteriorly. Stylocerite reaching to about distal 0.33 of second segment of antennular peduncle. Scaphocerite with narrow blade, lateral tooth exceeding blade, reaching middle of third segment of antennular peduncle. Anterolateral margin of carapace obtuse. Chela of pereopod 1 covered with fine denticles, dactyl shorter than palm, bearing 3 teeth, fingers gaping. Pereopod 2 with 5 carpal articles, article 1 longer than article 5 and about equal to articles 2, 3, 4 together. Pereopods 3, 4 with dilated merus, with movable spines on merus, ischium; acute dactyl. Pereopod 5 with spine on merus only, brush of bristles on propodus. Abdominal pleura 1–4 rounded, pleuron 5 bluntly angled. Telson with 2 pairs spines on dorsal surface, 2 spines at each posterolateral angle, posterior margin slightly curved. Total length about 25 mm.

Color in life. Mostly translucent, with minute red, blue spots; fingers, telson tinted light purple ( Glassell 1938).

Habitat and depth. In burrows of Neotrypaea californiensis (Callianassidae) or Upogebia spp. (Upogebiidae) , intertidal zone to 10 m.

Range. Los Angeles Harbor, California to Ensenada, Mexico. Type locality Estero de Punta Banda , Ensenada, Mexico .