Periclimenes psamathe ( De Man, 1902 )

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 : 545-547

Periclimenes psamathe ( De Man, 1902)

( Fig. 31 )

Urocaris psamathe De Man, 1902: 816 , pl. 25: fig. 51; Borradaile, 1917: 354.

Periclimenes (Ancylocaris) psamathe - Kemp. 1922: 173.

Periclimenes (Harpilius) psamathe - Holthuis, 1952a: 61, Fig. 23 ; Monod, 1976: 14, Figs. 1-28 .

Periclimenes psamathe - Bruce, 1966: 21, figs 1c, 2c, d; 1970a: 541-543, Fig. 3 ; 1979a: 227; 2003: 241; Bruce & Svoboda, 1984: 94; Müller, 1993: 105; Li, 2000: 229, Fig. 304; De Grave, 2000: 139.

Material examined. – 1 male, 9 females, 6 ovig females, CN 10 B- 5, [18º45’N, 108º30’E], 23m, muddy sand, BT, coll. Zhengang Fan, 26 Jan.1959 ; 1 ovig female, CN N219 B-175C, [18º15’N, 108º30’E], 54m, muddy sand and shell pieces, AT, coll. J. Y. Liu, 16 May.1960 .

Diagnosis. – Rostrum particularly long and slender, with 2 + 2 + 1 dorsal teeth, excluding the epigastric tooth on carapace, two proximal teeth and epigastric tooth large, ventrally denticulate, distal teeth small, simple, ventral margin unarmed. Carapace without supraorbital spine, antennal and hepatic spines present; inferior orbital angle produced, without reflected inner flange. Abdomen with pleura posteroventrally rounded; telson with two pairs of dorsal spines, three pairs of posterior marginal spines. Mandible without palp. Fourth thoracic sternite without medial process. Third maxilliped with slender endopod, ischiomerus and basis completely fused, exopod well developed with terminal plumose setae. First pereiopod slender, with fingers distinctly shorter than palm, chela much shorter than carpus. Second pereiopod very slender, markedly unequal, dissimilar, major pereiopod highly elongate, chela and carpus tuberculate, fingers less than 0.33 as long as palm, with cutting edges dentate, chela about 0.33 to 0.4 as long as carpus; minor second pereiopod small, chela and carpus smooth, fingers unarmed. Third pereiopod slender, with propodus at least 5 times as long as dactyl.

Distribution. – Eastern Africa to South China Sea, Japan, Philippines, Great Barrier Reef of Australia, New Caledonia, and Marshall Islands. Associated with gorgonians.

Remarks. – This is a peculiar species in Periclimenes with very long and slender rostrum, of which the dorsal teeth and epigastric tooth are very similar to that of Urocaridella spp. in subfamily Palaemoninae . Its systematic position needs further study.

Figures

Fig. 31. Periclimenes psamathe (De Man, 1902). a, carapace and rostrum, lateral view; b, mandible; c, tip of telson, dorsal view.

Fig. 23. Paranchistus liui, new species. a, 1st pereiopod; b, same, chela; c, major (left) 2nd pereiopod; d, same, fingers; e, minor (right) 2nd pereiopod; f, 3rd pereiopod; g, 5th pereiopod; h, telson and uropods, dorsal 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.