Macrobrachium nipponense (De Haan, 1849)

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 nipponense (De Haan, 1849)

Palemon nipponensis De Haan, 1849:171 [type locality: Japan].

Macrobrachium nipponense – Holthuis, 1950: 172; Liu, 1955: 56, Pl. 19 Fig. 2 ; Dang & Nguyen, 1972: 1; Kim, 1976: 141; Dang, 1980: 394, Fig. 225; Chong et al., 1987: 313, Fig. 1 , c, d; Liu et al., 1990: 111, Fig. 9 (part); Shy & Yu, 1998: 41, Fig. 16; Cai & Dai, 1999: 220; Cai & Ng, 2002: 78.

Material examined. – 17 males, cl 9.5-19.0 mm, UR, Buhi Lake , Philippines, coll. Myapa, 19 Aug.1985 ; 6 males, cl 10.5-19.5 mm, 3 females, cl 12-16.0 mm, 4 ovig. females, cl 12-14.5 mm, UR, Binahugan River , Buhi, Camarines Sur, southern Luzon, Philippines, 19 Aug.1985 .

Remarks. – Macrobrachium nipponense is commonly found in various kinds of inland water bodies in main islands of Japan, Korea, mainland China, Taiwan, Vietnam (Cai & Dai, 1999), Myanmar (Cai & Ng, 2002) and have been introduced to Singapore ( Chong et al., 1987). The present specimens were found in the lake of Buhi, Camarines Sur of southern Luzon. The occurrence of M. nipponense in Philippines could be a result of introduction. Macrobrachium nipponense has not been recorded before although it is very different from other Philippine species in the form of rostrum, which is long and straight, reaching to or beyond the end of scaphocerite, the long and slender second pereiopods, with a carpus as long as or slightly shorter than chela and the presence of dense setae on the cutting edges of fingers. This is a new record for the Philippines.

Distribution. – Japan, Korea, mainland China, Taiwan, Vietnam, Myanmar and has been introduced to Singapore and Philippines.

Figures

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. 1. Caridina cebuensis, new species, male, cl 2.5 mm, paratype, Cebu, Philippines: A, cephalothorax and cephalic appendages, lateral view; B, telson; C, distal portion of telson; D, scaphocerite; E, mandible; F, maxillula; G, first maxilliped; H, second maxilliped; I, third maxilliped; J, first pereiopod; K, second pereiopod; L, uropodal diaeresis. Scale bars: A = 1 mm; B, D-K = 0.5 mm; D, C = 0.1 mm; L = 0.2 mm.

Fig.9. Caridina mindanao, new species, male, cl 3.3 mm, Mindanao, Philippines: A, first pereiopod; B, second pereiopod; C, third pereiopod; D, dactylus of third pereiopod; E, fifth pereiopod; F, dactylus of fifth pereiopod; G, male first pleopod; H, appendix masculina and appendix interna of male second pleopod; I, preanal carina. Scale bars: A-C, E, I = 0.5 mm; D, F = 0.1 mm; G, H = 0.2 mm.