Potamalpheops miyai Yeo & Ng, 1997

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 : 267

Potamalpheops miyai Yeo & Ng, 1997

( Figs. 7 H-L)

Potamalpheops miyai Yeo & Ng, 1997: 175 , Fig. 3 , 4 [type locality: mangrove of Palau Bintan , Indonesia].

Material examined. – 1 male, cl 3.0 mm, UR, Surigao mangrove, Mindanao Island, Philippines, 25 Jul 1985 .

Comparative material examined. – 1 male, cl 2.5 mm, ZRC1996.16 , holotype of Potamalpheops miyai Yeo & Ng, 1979 , Sungai Lagoi, bridge to Kampong Lagoi, Pulau Bintan, Indonesia, coll. H. H. Tan, 27 Jun.1995 ; 1 male, cl 2.5 mm, 8 females, cl 2.5-3.3 mm, ZRC 1996.42 , paratypes, data same as holotype .

Remarks. – Potamalpheops miyai is characterized by the short rostrum, and the more concealed eyes. The Mindanao specimen fits well with the detail original description (Yeo & Ng, 1997) with the exception of the proportions of various joints in the carpus of second chelipeds. The ratio of the 5- segmented articles in average is about 10: 2.2: 2.2: 2.2: 4.9 from proximal segment to posterior one while it is 6.0: 2.3: 2.3: 2.3: 4.0 in the Mindanao specimen. This discrepancy could be reasonably regarded as variation in the individual or in the local population. This is the second record for the species, as well as a new record for Philippines. Cai & Anker (2004) recently described the first species of the genus, P. palawanensis to occur in Philippines.

Distribution. – Indonesia and Philippines.

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. 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.

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.