Caridina gracilipes De Man, 1892

Cai, Yixiong, Ng, Peter K. L. & Choy, Satish, 2007, Freshwater Shrimps Of The Family Atyidae (Crustacea: Decapoda: Caridea) From Peninsular Malaysia And Singapore, Raffles Bulletin of Zoology 55 (2), pp. 277-309 : 284

Caridina gracilipes De Man, 1892

Caridina Wyckii var. gracilipes De Man, 1892: 387 , Pl. 24 Fig.

29–29e [type localities: Sulawesi (Celebes), and Selajar ,

Indonesia]. Caridina nilotica gracilipes – De Man, 1908b: 270, Figs.7a, b . Caridina wyckii var. gracilipes – Schenkel, 1902: 498. Caridina longirostris – Chace, 1997: 14 (part), Fig. 7 [not Caridina longirostris H. Milne-Edwards, 1837 ]. Caridina gracilipes – Wowor et al., 2004: 341, Fig. 6D ; Cai &

Shokita, 2006a: 250.

Material examined. – Singapore: 5 males, cl 1.9–2.7 mm , 11 females, cl 2.4–3.1 mm, ZRC 2007.0367 , pond at West Coast Park , brackish water, Singapore, coll. K. Lim & P. G. Lee, 21 Aug.1992 .

Habitat. – Lower reaches of rivers and streams with seawater influence.

Remarks. – Caridina gracilipes De Man, 1892 is morphologically similar to C. elongapoda Liang & Yan, 1977 and C. longirostris H. Milne-Edwards. However , it is different from C. elongapoda in lacking an appendix interna on the endopod of male first pleopod. Caridina gracilipes can be distinguished from C. longirostris (cf. Cai et al., 2006) in its elongated carpus of the first pereiopod and dactylus of the last pereiopods (vs. stout and short). Caridina gracilipes has been reported from Taiwan, southern China, Sulawesi, Philippines and Sarawak (Cai & Shokita, 2006a; Wowor, et al., 2004). This is the first record of the species for the Malay Peninsula.

Distribution. – Sulawesi, Taiwan, Chinese mainland, the Philippines, Borneo and Malay Peninsula (present study; Cai & Shokita, 2006a; Wowor, et al., 2004).

Figures

Fig. 7. Caridina sumatrensis: A, cephalothorax and cephalic appendages; B, distal portion of telson; C, first pereiopod; D, second pereiopod; E, third pereiopod; F, dactylus of third pereiopod; G, fifth pereiopod; H, dactylus of fifth pereiopod; I, male first pleopod; J, male second pleopod. Scale bars: A = 1 mm; C–E, G = 0.5 mm; B, F, H, I, J = 0.2 mm. (male, cl 3.7 mm, Sungai Telor, Peninsular Malaysia, ZRC).

Fig. 6. Caridina propinqua: A, cephalothorax and cephalic appendages; B, scaphocerite; C, mandible; D, maxillula; E, maxilla; F, first maxilliped; G, second maxilliped; H, third maxilliped; I, first pereiopod; J, second pereiopod; K, third pereiopod; L, fifth pereiopod; M, endopod of male first pleopod; N, appendix masculina and appendix interna of male second pleopod. Scale bars: A, B = 1 mm; C–L = 0.5 mm; M, N = 0.2 mm. (male, cl 2.9 mm, Sungai Sedili, Johor, Peninsular Malaysia, ZRC).