Caridina laoagensis Blanco, 1939

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 : 246

Caridina laoagensis Blanco, 1939

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

Material examined. – 7 males, cl 3.9-4.9 mm, 3 ovig. females, cl 6.5-7.2 mm, 1 female, cl 3.5 mm, UR, upstream of tributary of Pugo River , Luzon Island, Philippines, 16 Jul.1985 ; 2 ovig. females, cl 7.0- 8.1 mm, 1 female, cl 7.1 mm, 17 males, cl 3.8-5.5 mm, UR, Malayas River , Victoria, Mindanao Island, Philippines, 14 Aug.1985 ; 9 males, cl 4.1-4.5 mm, 8 ovig. females, cl 6.1-7.2 mm, UR, upper stream of Sagay River , Cebu Island, Philippines, 27 Jul.1985 ; 1 male, cl 4.2 mm, UR, spring water to Sagay River , Cebu Island, Philippines, 27 Jul.1985 ; 1 ovig. female, cl 5.7 mm, 1 juv., UR, a spring near Branch of National Museum , Suzoen, Palawan Island, Philippines, no date ; 9 males, cl 3.8-5.2 mm, 2 females, cl 4.1-4.2 mm, 13 ovig. females, cl 4.4-5.5 mm, UR, Daakrongsod River , Cebu Island, Philippines, 28 Jul.1985 ; 3 males, cl 4.5-5.6 mm, 2 females, cl 4.5-4.6 mm, 7 ovig. females, cl 7.5-7.6 mm, UR, river outside the University of Agriculture , Sapiland village, Luzon Island, Philippines, 15 Jul.1985 ; 2 males, cl 2.8-3.2 mm, 1 female, cl 4.5 mm, 4 ovig. females, 5.5-7.2 mm, UR, Alag River , Mindoro Island, Philippines, 15 Aug.1985 ; 1 male, cl 3.6 mm, 9 females, cl 4.2-4.9 mm, 9 ovig. females, cl 4.1-6.5 mm, UR, San Gabriel , Luzon Islands, Philippines, 15 Jul.1985 ; 1 male, cl 3.8 mm, 3 females, cl 5.3-5.8 mm, 1 ovig. female, cl 5.8 mm, UR, Pitogo River , Panay Island, Philippines, 19 Aug.1985 ; 3 males, cl 3.1-3.5 mm, 8 females, cl 3.9-5.8 mm, 4 ovig. females, cl 4.7-6.2 mm, UR, Tag Bariri , Palawan Island, Philippines, 9 Aug.1985 ; 12 ovig. females, cl 4.2- 4.5 mm, 8 males, cl 3.0- 3.8 mm, UR, Panitian River , upper stream, ca 30 km from river mouth, Palawan Island, Philippines, 6 Aug.1985 ; 1 male, cl. 3.5 mm, 3 ovig. females, cl 5.3-5.6 mm, UR, Sta. Rosa , Luzon, Philippines, 15 Jul.1985 ; 4 males, cl 4.5-5.5 mm, UR, Sewaragan River , San Joaquin, Panay Island, Philippines, 19 Aug.1985 ; 3 males, cl 3.6-4.3 mm, 4 females, 5.2-6.4 mm, 4 ovig. females, cl 5.3-6.2 mm, UR, Manuanga River , Cebu Island, Philippines, 29 Jul.1985 ; 2 males, cl 2.8-3.3 mm, 1 female, cl 5.3 mm, 3 ovig. females, cl 5.4-6.5 mm, UR, Caboroan , Luzon Island, Philippines, 15 Jul.1985 ; 4 males, cl 3.7-4.2 mm, 2 females, cl 3.6- 4.6 mm, 11 ovig. females, cl 5.0- 6.1 mm, UR, Papait River , St. 2, Upper stream, Palawan Island, Philippines, 9 Aug.1985 ; 1 male, cl 4.5 mm, 3 ovig. females, cl 5.9-6.1 mm, UR, Panibacan River , Palawan Island, Philippines, 6 Aug.1985 ; 4 males, cl 4.0- 4.8 mm, 1 female, cl 6.7 mm, 5 ovig. females, cl 6.5-7.4 mm, Bongabong River , Mindoro Island, Philippines, 14 Aug.1985 ; 4 males, cl 3.0- 4.0 mm, 2 females, cl 5.2-6.2 mm, 3 ovig. females, cl 5.8-7.5 mm, UR, Naguilian River , Luzon, Philippines, 15 Jul.1985 ; 1 female, cl 3.8 mm, 3 ovig. females, cl 5.2-5.7 mm, UR, Iraan River , Philippines, 5 Aug.1985 ; 3 males, cl 3.8-4.0 mm, 1 female, cl 4.8 mm, 4 ovig. females, cl 5.5-7.0 mm, UR, Agan River , Mindoro Island, Philippines, 14 Aug.1985 .

Remarks. – Chace (1997) commented that Caridina laoagensis may be a synonym of one of C. weberi subspecies. Recent study by Cai & Ng (in preparation) found that C. laoagensis differs from all subspecies of C. weberi and other congeners, should be regarded as a good species. C. laoagensis is characteristic by the straight rostrum, slightly crested at the base, over the orbit, the posterior rostral teeth placed distinctly before the postorbital margin, and the distal spines and setae on the telson. This is one of the most common species in Philippines.

Distribution. – Philippines.

Figures

Fig. 3. Caridina buhi, new species, ovig. female, cl 4.0 mm, holotype, NSMT, Binahugan River, Buhi, Camarines Sur, Luzon, Philippines: A, cephalothorax and cephalic appendages, lateral view; B, telson; C, distal portion of telson; D, first pereiopod; E, second pereiopod; F, third pereiopod; G, dactylus of third pereiopod; H, fifth pereiopod; I, dactylus of fifth pereiopod; J, preanal carina; K, uropodal diaeresis. Scale bars: A = 1 mm, B, D-F, H, J = 0.5 mm; C, G, I, K = 0.2 mm.