Periclimenes hirsutus Bruce, 1971a

Li, Xinzheng, Bruce, Alexander J. & Manning *, Raymond B., 2004, Some Palaemonid Shrimps (Crustacea: Decapoda) From Northern South China Sea, With Descripitions Of Two New Species, Raffles Bulletin of Zoology 52 (2), pp. 513-553 : 544-545

Periclimenes hirsutus Bruce, 1971a

( Fig. 29 )

Periclimenes hirsutus Bruce, 1971a: 91 , Figs. 1-6 ; 1976: 10; Müller, 1993: 86; Li, 2000: 189, Fig. 240.

Material examined. – 2 ovigerous females, CL 5.2, 5.5 mm, CN NB7 B-14, [18º45’N, 110º30’E], 32m, sand, AT, coll. Shen, 8 Mar.1960; 1 male 2 females (ovig) , CN X202 B-55, [19º45’N, 107º30’E], sand, 46m, AT, coll. F. Sun, 15 Apr.1962; 1 female , CN N219 B-175E, [18º15’N, 108º30’E], muddy sand and shell pieces, 54m, AT, coll. J. Y. Liu, 16 May.1960 .

Diagnosis. – Rostrum over-reaching the antennular peduncle, with 10 small dorsal teeth, ventral unarmed. Carapace with antennal and hepatic spines, hepatic spine smaller than antennal and just behind latter, without supraorbital spine. Fourth thoracic sternite without median process. First pereiopods with fingers subspatulate, subequal to palm, carpus 1.5 times as long as chela. Second pereiopods robust, similar and equal, exceeding scaphocerite by chela; fingers slightly more than 0.75 as long as palm, covered with row of short dense setae along the cutting edges, dactyl armed with 1, fixed finger with 2 blunt teeth on proximal 0.25 of cutting edges, carpus less than half as long as palm. Ambulatory pereiopods robust, covered with setae, propodi covered with more than 10 tufts of long setae along ventromedial and ventrolateral margins.

Description. – Middle-sized pontoniine shrimps of subcylindrical and robust body form, covered with pubescence on the body surface, pereiopods and pleopods, propodus of ambulatory pereiopods also with many tufts of long setae. Rostrum well developed, compressed, directed anteroventrally, over-reaching the antennular peduncle but not reaching apical margin of scaphocerite, lateral carinae distinct, proximally extended laterally; dorsal margin with 10 small teeth, posteriormost tooth anterior to the level of orbital margin, at the level of inferior angle of orbit; ventral margin straight, unarmed. Carapace with orbit not developed, inferior orbital angle slightly produced and rounded; anterolateral angle rounded; antennal spine placed just below inferior orbital angle, hepatic spine smaller than antennal and just behind latter; supraorbital spine absent. Fourth thoracic sternite without median process. First pereiopods moderately slender, exceeding scaphocerite by chela; fingers broad, more or less subspatulate, subequal to palm, with the cutting edges entire, laterally with 4 rows of transverse setae; carpus 1.5 times as long as chela, with 2 long subdistal setae and 1 row of short setae; ischium subequal to chela, with long setae along flexor margin. Second pereiopods robust, similar and equal, exceeding scaphocerite by chela; fingers slightly more than 0.75 as long as palm, covered with row of short dense setae along the cutting edges, dactyl armed with 1, fixed finger with 2 blunt teeth on proximal 0.25 of cutting edges; tips of fingers hooked, outer surface with sparse setae; carpus less than 1.5 times as long as distal width, less than half as long as palm, with distal margin entire, merus distinctly shorter than palm, unarmed, ischium subequal to merus, unarmed. Ambulatory pereiopods robust, third pereiopods reaching distal margin of scaphocerite and fifth reaching distal margin of first antennular peduncle segment; covered with setae, longer and denser proximally; dactyls simple, narrow, slender and short, hooked, distal margin of corpus deeper than base of unguis; propodus covered with more than 10 tufts of long setae along ventromedial and ventrolateral margins; carpus broadened distally, 1.5 times as long as distal width, less than half as long as propodus; merus slightly longer than propodus.

Distribution. – Mtoni, Zanzibar, Fiji, Seychelles, Andaman Islands, New Caledonia. Recorded here for the first time from South China Sea.

Remarks. – The pubescence on the body of our specimens covered on the lower margins of carapace, abdominal pleura, telson, and sternites, the dorsal and lateral surface of the body are almost smooth, different from the types. This difference may have been due to abrasion during capture or subdequently.

Figures

Fig. 29. Periclimenes hirsutus Bruce, 1971a, lateral view.

Fig. 1. Coutierella tonkinensis Sollaud, 1914. a, carapace and rostrum, lateral view; b, mandible; c, 1st maxilliped; d, telson; e, tip of telson.

Fig. 2. Exopalaemon orientis Holthuis, 1950. a, carapace and rostrum, lateral view; b, mandible; c, 1st pereiopod; d, 2nd pereiopod; e, 3rd pereiopod; f, same, dactyl and propodus; g, 5th pereiopod; h, same, dactyl and propodus.

Fig. 3. Leander tenuicornis (Say, 1818). a, carapace and rostrum, lateral view, female; b, same, male; c, antennule.

Fig. 4. Leandrites stenopus Holthuis, 1950. a, carapace and rostrum, lateral view; b, eye; c, antennule; d, scaphocerite; e, telson and uropod, dorsal view; f, tip of telson; g, eggs.

Fig. 5. Leandrites stenopus Holthuis, 1950. a, b, carapace and rostrum, lateral view; c-e, mandible, c, d, right, e, left; f, maxillula; g, maxilla; h, 1st maxilliped; i, 2nd maxilliped; j, 3rd maxilliped.