Macrobrachium mammillodactylus ( Thallwitz, 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 : 265

Macrobrachium mammillodactylus ( Thallwitz, 1892)

Palaemon idae var. mammillodactylus Thallwitz, 1892: 15 [type locality: Luzon , Philippines, or northern Celebes].

Palaemon (Eupalaemon) Wolterstorffi Nobili, 1900: 1 [type locality: Surabaja , eastern Java].

Palaemon philippinensis Cowles, 1914: 340 , Pl. 2 Fig. 2 [type locality: San Juan and Pasig river, near Manila, Philippines].

Macrobrachium mammillodactylus - Holthuis, 1950: 148, Fig. 34; Liu, Liang & Yan, 1990: 109, Fig. 7 ; Shy & Yu, 1998: 40.

Material examined. – 3 males, cl 31-40 mm, 2 females, cl 14.5- 16.5 mm, 5 ovig. females, cl 18-26 mm, NSMT, Philippines, coll. M. Takeda, 1985 ; 1 male, cl 19.5 mm, UR, Panibacan River , Palawan Island, Philippines, 6 Aug.1985 .

Remarks. – Macrobrachium mammillodactylus is characterized by the long second pereiopod and the presence of a series of 8-10 tubercles along inner side of the cutting edges. This character, however, only appears at large size male specimens. Cowles (1914) described a new species, Palaemon philippinensis . It was, however, been synonymized with M. mammillodactylus by Holthuis (1950).

Distribution. – Indonesia, Philippines, southern China and Taiwan.

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. 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.