Periclimenes longirostris (Borradaile 1915)

Periclimenes longirostris (Borradaile, 1915)

Palaemonella longirostris Borradaile, 1915:210 [type locality: Naifaro Island, Fadifollu Atoll, Maldive Islands].

Pariclimenes (Falciger) affinis Borradaile, 1915:211 [type locality: Salomon Island, Chagos Archipelago; not Palaemonella affinis Zehntner, 1894].

Periclimenes (Ancylocaris) proximus Kemp, 1922:201, figs. 51–53 [type locality: Port Blair, Andaman Islands; 7–15 meters].

Periclimenes (Harpilius) longirostris.—Holthuis, 1958:3, fig. 1.

Periclimenes longirostris.—Bruce, 1981c:195, figs. 4, 18a,d.

DIAGNOSIS.—Integument smooth, not pitted, on lateral areas of carapace and abdomen; rostrum reaching nearly to level of or overreaching antennal scale, shallowly palaemonoid, directed slightly anterodorsad anteriorly, rostral formula 1 + 5–6/2–3, posteriormost tooth not distinctly isolated from remainder of dorsal rostral series but arising slightly farther from 2nd tooth than latter from 3rd, situated posterior to level of hepatic spine; carapace with supraorbital spine, hepatic spine no larger than antennal spine, arising posteroventral to latter, not extending beyond anterior margin of carapace, orbital angle weakly triangular, not ovate; abdomen without compressed dorsal prominence on 3rd somite, 6th somite about 1 times as long as 5th; telson with 2 pairs of dorsolateral spines anterior to posterior margin, anterior pair arising anterior to mid-length; eye with cornea hemispherical, not produced distally; antennular peduncle with 1 distolateral spine on basal segment; antennal scale 4–5 times as long as wide, lateral margin distinctly concave, distolateral tooth far overreaching distal margin of narrow blade; 4th thoracic sternite with slender median process; 1st pereopod far overreaching antennal scale, fingers not pectinate on opposable margins; 2nd pereopod with fingers slightly more or less than as long as palm, carpus longer or shorter than palm, 7–8 times as long as distal width, without distal spines, merus with distal tooth on flexor margin; 3rd pereopod with dactyl not subdistally truncate, without denticulate lobe on flexor margin, simple, not biunguiculate, flexor margin distinctly concave, propodus with spinules on flexor margin, not segmented; 5th pereopod reaching about as far as distal end of antennal scale; uropod not overreaching extended telson; maximum postorbital carapace length about 2 mm.

RANGE.—Northern Red Sea and western Indian Ocean to Philippines, Indonesia, Papua, northeastern Australia, and Marshall Islands; to a depth of at least 17 meters.