Macrobrachium equidens ( Dana, 1852 )

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 : 265

Macrobrachium equidens ( Dana, 1852)

Palaemon equidens Dana, 1852: 26 [type locality: Singapore]. Palaemon sundaicus – Cowles, 1914: 355, Pl. 2 Fig. 3 .

Macrobrachium equidens – Holthuis, 1950:162, Fig. 36; 1980: 90; Liu et al., 1990: 110, Fig. 8 ; Chace & Bruce, 1993: 25, Fig. 4 ; Yeo et al., 1999: 226; Cai, Naiyanetr & Ng, 2004: 389; Cai & Anker, 2004: 258.

Material examined. – 3 females, cl 18-23 mm, UR, Iloilo city market Panay Island , Philippines; 19 Aug. 1985 ; 1 female, cl 14.5 mm, 1 ovig. female, 16.0 mm, UR, Sewaragan River , San Joaquin, Panay Island, Philippines, 19 Aug.1985 ; 1 ovig. female, cl 14.0 mm, UR, Bororo River , Luzon Island, Philippines, 16 Jul.1985 ; 2 females, cl 6.2-7.9 mm, Villaflor River , Mindoro Island, Philippines, 15 Aug.1985 ; 1 male, cl 15 mm, 1 female, cl 10.0 mm, UR, brakish water in a cave near mangrove, Bahile River , Palawan Island, Philippines, 9 Aug.1985 ; 1 female, cl 12 mm, UR, San Francisco River , Surigao Del Nork, Mindanao Island, Philippines, 25 Jul.1985 ; 3 ovig. females, cl 7.5-8.4 mm, UR, Naguilian River , Luzon, Philippines, 14 Jul.1985 .

Remarks. – Marcobrachium equidens is a brackish water species, with smaller specimens being commonly found in mangrove creeks. It is known from a very wide area in the Indo-West Pacific, from Madagascar to the Solomon Islands.

Distribution. – Indo-West Pacific.

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.

Fig. 8. Caridina mindanao, new species, ovig. female, cl 3.8 mm, Mindanao, Philippines: A. telson; 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, third maxilliped; J, diaeresis. Scale bars: A, C-E, G, I = 0.5 mm; B, F, H = 0.1 mm; J = 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.