Macrobrachium lepidactyloides ( De Man, 1892 )

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 : 264-265

Macrobrachium lepidactyloides ( De Man, 1892)

Palaemon (Macrobrachium) lepidactyloides De Man, 1892: 497 , pl. 29: fig. 51 [type locality: “ Raka-mbaha, W. Flores”, Indonesia].

Palaemon lepidactylus – Cowles, 1914: 389, pl. 3: fig. 9 [not Palaemon lepidactylus Hilgendorf, 1879 ].

Macrobrachium hirtimanus – Holthuis, 1950: 245 (part), fig. 51a; Hwang & Yu, 1982: 163, fig. 5; Shy & Yu, 1998: 29.

Macrobrachium lepidactyloides - Holthuis, 1952: 210, pl. 15: fig 2; Chace & Bruce, 1993: 32; Cai & Anker, 2004: 259.

Material examined. – 1 male, cl 12 mm, 3 females, cl 12-12.5 mm, UR, Tag Bariri , Palawan, Island, Philippines, 9 Aug.1985 ; 4 males, cl 12.5-15 mm, 1 female, cl 15.0 mm, UR, Panitian River , upper stream, ca 30 km from river mouth, Palawan Island, Philippines, 6 Aug.1985 ; 1 male, cl 12 mm, UR, Sewaragan River , San Joaquin, Panay Island, Philippines, 19 Aug.1985 ; 2 males, cl 13-17 mm, Panibacan River , Palawan Island, Philippines, 6 Aug.1985 . 3 females, cl 10.0-15.0 mm, UR, Mabuhay River , Mindanao Island, Philippines, 25 Jul.1985 ; 6 males, cl 14-18 mm, 7 females, cl 11-13 mm, 18 ovig. females, cl 11.5-18 mm, UR, Iraan River , Philippines, 5 Aug.1985 ; 2 males, cl 22.5-26.0 mm, Agan River , Mindoro Island, Philippines, 14 Aug.1985 .

Remarks. – Chace & Bruce (1993: 32) commented that “... two males from the Zamboanga River in which the major second cheliped is intact have the palm less broad than it is in typical specimens of the species, much as in M. placidum , suggesting the possibility that M. lepidactyloides and M. placidum may eventually prove to be indistinguishable.” Our specimens, however, are all having a much broad and more inflated palm than that of M. placidum . M. lepidactyloides has previously been reported from Luzon ( Cowles, 1914) and Mindanao (Chace & Bruce, 1993) , Philippines.

Distribution. – Indonesia, Philippines and Taiwan.