Eusergestes similis ( Hansen, 1903 )

Wicksten, Mary K., 2012, Decapod Crustacea of the Californian and Oregonian Zoogeographic Provinces 3371, Zootaxa 3371, pp. 1-307 : 28

Eusergestes similis ( Hansen, 1903)

( Fig. 6F–N)

Sergestes similis Hansen, 1903: 60 , pl. 11, figs. 6a–d. — Schmitt 1921: 19, fig. 8. — Burkenroad 1937: 321. — Ebeling et al. 1969: 12. — Pearcy & Forss 1969: 755. — Word & Charwat 1976: 29. — Butler 1980: 47. — Krygier & Pearcy 1981: 73. — Hendrickx & Estrada-Navarrete 1989: 109; 1996: 61, fig. 39. — Pérez Farfante & Kensley 1997: 197. — Wicksten 2002: 131.

Eusergestes similis .— Judkins & Kensley 2008: 76.

Diagnosis (after Butler1980). Rostrum sharply pointed, angled upward obliquely. Carapace with prominent supraorbital tooth, moderate hepatic spine. Five organs of Pesta present: prominent anterolateral pair, lateral midgastric pair, single posterolateral organ.Antennular peduncle slender. Scaphocerite not reaching end of third segment of antennular peduncle.Second maxilliped short, stout.Third maxilliped barely longer than third pereopod; dactyl of third maxilliped with 8 subsegments. Pereopods slender, pereopod 3 longer than others. Pereopods 4, 5 setose, each without dactyl. Abdominal somites with lateral sulci (difficult to see in preserved material). Telson shorter than uropods, with acute apex. Outer uropod without setae on outer margin. Total length 57–61 mm.

Color in life. Transparent with orange-red spots over carapace and abdomen, telson, uropods and bases of appendages ( Butler 1980, color plate 1).

Habitat and depth. Pelagic, 50–2400 m, usually above 1000 m, between 200–600 m by day and 50–200 m by night.

Range. Japan, Bering Sea to Gulf of California , off Chile, eastern South Atlantic in Benguela Current. Type locality "off Japan.”

Remarks. This is one of the most common sergestids in California and Oregon. Cowles (1994) provided a detailed account of its swimming behavior.