Caridina laoagensis Blanco, 1939

Cai, Yixiong, Choy, Satish & Ng, Peter K. L., 2009, Epigean And Hypogean Freshwater Shrimps Of Bohol Island, Central Philippines (Crustacea: Decapoda: Caridea), Raffles Bulletin of Zoology 57 (1), pp. 65-89 : 67

Caridina laoagensis Blanco, 1939

Caridina laoagensis Blanco, 1939: 390 , Pl. 2 [type locality: Laoag River, Province of Ilocos Norte, Luzon, the Philippines]; Chace, 1997: 12; Cai & Anker, 2004: 237, Fig. 3 ; Cai & Shokita, 2006a: 248; Cai & Shokita, 2006b: 2141.

Material examined. – Two males, cl 2.6–2.9 mm, 1 female, cl 2.9 mm, 2 ovigerous females, cl 5.6–6.0 mm, ZRC 2007.0275 , river outside the Inabacan Cave , Antequrra, coll. Y. Cai et al., 16 Dec.2000 ; 3 males, cl 3.2–3.7 mm, 2 ovigerous females, cl 6.2–6.3

mm, ZRC 2007.0276 , river outside Inabacan Cave , Antequrra, coll. Y. Cai et al., 18 Dec.2000 .

Remarks. – Chace (1997) commented that Caridina laoagensis will eventually fall into synonymy with the variable C. weberi De Man, 1892 . Cai & Anker (2004) has shown that C. laoagensis differs markedly from all subspecies of C. weberi and other congeners, and should be regarded as a good species. Caridina laoagensis is characterized by its straight rostrum which is slightly crested basally above the orbit, and the pattern of distal spines and setae on the telson, on which, the median plumose seatae are inserted betweem two lateral spines. This is one of the most common species of atyids in the Philippines.

Figures

Fig. 3. Caridina lobocensis, new species: A, cephalothorax and cephalic appendages, lateral view; 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, preanal carina; J, uropodal diaeresis. Scale bars: A = 2 mm, B, F, H, J = 0.2 mm; C–E, G = 1 mm; I = 0.5 mm (male, cl 5.7 mm, paratype, ZRC, Bohol Island, Philippines).