Periclimenes commensalis

Periclimenes commensalis Borradaile, 1915

Periclimenes (Cristiger) commensalis Borradaile, 1915:211 [type locality: Murray Island, Torres Strait; on comatulid crinoids].

Periclimenes (Periclimenes) commensalis.—Holthuis, 1952c:53, figs. 18, 19.

Periclimenes commensalis Bruce, 1983c:883, fig. 4E.

DIAGNOSIS.—Integument smooth, not pitted, on lateral areas of carapace and abdomen; rostrum not overreaching antennal scale, palaemonoid, directed slightly anteroventrad, rostral formula 0 + 5–7/1–2, posteriormost tooth not isolated from remainder of dorsal rostral series; carapace with supraorbital spine, usually arising from supraorbital eave, hepatic spine slightly larger than antennal spine, arising posteroventral to latter, not extending beyond anterior margin of carapace, orbital angle subovate; abdomen without compressed dorsal prominence on 3rd somite, 6th somite nearly 1 times as long as 5th; telson with 2 pairs of minute dorsolateral spines, both pairs arising in posterior of length; eye with cornea hemispherical, not produced distally; antennular peduncle with 2 distolateral spines on basal segment; antennal scale fully 3 times as long as wide, lateral margin nearly straight, distolateral tooth not nearly reaching level of distal margin of blade; 4th thoracic sternite without slender median process; 1st pereopod overreaching antennal scale by about length of fingers, latter not pectinate on opposable margins; 2nd pereopod with fingers about as long as palm, finely serrate on distal parts of opposable margins, carpus fully as long as palm, about as long as distal width, without distal spines, merus without distal tooth on flexor margin; 3rd pereopod with dactyl not subdistally truncate, without denticulate lobe on flexor margin, biunguiculate, flexor margin somewhat sinuous, propodus with few spines on flexor margin, not segmented; 5th pereopod not overreaching antennal scale; uropod overreaching extended telson; maximum postorbital carapace length about 4 mm.

RANGE.—Western Indian Ocean to Ryukyu Islands, Hong Kong, Indonesia, Australia, New Caledonia, and Caroline, Marshall, Solomon, and Fiji islands; associated with comatulid crinoids.