Caridina gracilirostris De Man, 1892

Shokita, Yixiong Cai Shigemitsu, 2006, Report On A Collection Of Freshwater Shrimps (Crustacea: Decapoda: Caridea) From The Philippines, With Descriptions Of Four New Species, Raffles Bulletin of Zoology 54 (2), pp. 245-270 : 250

Caridina gracilirostris De Man, 1892

Caridina gracilirostris De Man, 1892: 399 , Pl. 25 Fig. 31-31d [type locality: Balangnipa, Sulawesi (Celebes) Indonesia]; Bouvier, 1925: 142, Figs. 305-307; Holthuis, 1965: 23, Fig. 7 ; Tiwari & Pillai, 1971: 83, Fig. 2a, b ; Chace, 1997: 10, Fig. 4 ; Cai & Ng, 2001: 674, Fig. 7 .

Material examined. – 2 males, cl 3.8-3.9 mm, 3 females, cl 3.1-3.5 mm, UR, Sungao River (downstream of Mabuhay River), Mindanao Island, Philippines, 25 Jul.1985 ; 3 females, cl 3.8-4.3 mm, Sta. Rosa , Luzon, Philippines, 15 Jul.1985 ; 1 male, cl 4.2 mm, UR, Bororo River , Luzon, Philippines, 16 Jul.1985 ; 3 males, cl 3.5-4.1 mm, 12 females, cl 2.5-4.2 mm, 2 ovig. females, cl 4.2-4.6 mm, UR, Pagsanjan River , Philippines, 19 Jul.1985 .

Remarks. – Our specimens all have no appendix interna at the endopod of male first pleopod, should clearly be referred to the typical form of Caridina gracilirostris . Cai & Ng (in preparation) recently revised the Caridina gracilirostris species group, referring the form with no appendix interna in endopod of male first pleopod as C. gracilirostris and the other, with a distinct appendix interna in the endopod of male first pleopod as C. appendiculata Jalihal & Shenoy, 1998 .

Distribution. – Sulawesi, Philippines, Malay Peninsula, India, Madagascar.

Figures

Fig. 7. Caridina mindanao, new species, ovig. female, cl 3.8 mm, Mindanao, Philippines: A, cephalothorax and cephalic appendages; B, abdomen and telson; C, scaphocerite; D, mandible; E, maxillula; F, maxilla; G, first maxilliped; H, second maxilliped. Scale bars: A, B = 1 mm; C, H = 0.5 mm.

Fig. 2. Caridina cebuensis, new species, male, cl 2.5 mm, paratype, Cebu, Philippines:A, third pereiopod; B, dactylus of third pereiopod; C, fifth pereiopod; D, dactylus of fifth pereiopod; E, endopod of male first pleopod; F, appendix masculina and appendix interna of male second pleopod. Scale bars: A, C = 0.5 mm; B, D-F = 0.1 mm.

Fig. 4. Caridina buhi, new species, male, cl 3.3 mm, paratype, ZRC, Binahugan River, Buhi, Camarines Sur, Luzon, Philippines: A, cephalothorax and cephalic appendages; B, first pereiopod; C, second pereiopod; D, third pereiopod; E, dactylus of third pereiopod; F, fifth pereiopod; G, dactylus of fifth pereiopod; H, endopod of male first pleopod; I, appeedix interna and appendix masculina of male second pereiopod; J, scaphocerite; K, preanal carina. Scale bars: A, J = 1 mm, B-D, F, K = 0.5 mm, E, G, H, I = 0.1 mm.