Macrobrachium jaroense, (Cowles, 1914)

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

Macrobranchium jaroense ( Cowles, 1914)

Palaemon jaroensis Cowles, 1914: 385 , Pl. 3 Fig. 8 [type localitty: Hibucawan River near Jaro , Leyte].

Macrobrachium jaroense – Holthuis, 1950: 205; Hwang & Yu, 1982: 167; Chace & Bruce, 1993: 29, Fig. 7 .

Macrobrachium cf. jaroensis – Shy & Yu, 1998: 33.

Material examined. – 1 male, cl 16.0 mm, UR, Upstream of tributary of Pugo River , Luzon Island, Philippines, 16 Jul.1985 ; 1 female, cl 11.5 mm, UR, Alag River , Mindoro Island, Philippines, 15 Aug.1985 ; 1 female, cl 15.0 mm, 2 ovig. females, cl 11-16.0 mm, UR, San Gabriel , Luzon Island, Philippines, 15 Jul.1985 ; 2 males, cl 13-15 mm, 3 females, cl 9.5-11.0 mm, 4 ovig. females, cl 10- 11.5 mm, UR, Tag Bariri , Palawan Island, Philippines, 9 Aug.1985 ; 1 male, cl 21 mm, UR, Manuanga River , Cebu Island, Philippines, 29 Jul.1985 ; 1 male, cl 21.0 mm, UR, Villaflor River , Mindoro Island, Philippines, 15 Aug.1985 ; 3 males, cl 17.0- 17.5 mm, UR, upper stream of Sagay River , Cebu Island, Philippines, 27 Jul.1985 ; 3 males, cl 13-16 mm, 2 females, cl 12-15 mm, UR, Papait River , Station 2 at Upper stream, Palawan Island, Philippines, 9 Aug.1985 ; 1 male, cl 17 mm, 3 females, cl 14.0-17.0 mm, UR, Bongabong River , Mindoro Island, Philippines, 14 Aug.1985 ; 1 male, cl 17 mm, UR, Naguilian River , Luzon Island, Philippines, 14 Jul.1985 ; 2 males, cl 11-14.5 mm, UR, Iraan River , Mindoro Island, Philippines, 5 Aug.1985 ; 1 male, cl 7.5 mm, UR, Upstream of tributary of Pugo River , Luzon Island, Philippine, 16 Jul.1985 ; 2 males, cl 13-13.5 mm, UR, Pitogo River , Panay Island, Philippines, 19 Aug.1985 ; 1 male, cl 16.5 mm, UR, Sagay River , Cebu Island, Philippines, 27 Jul.1985 .

Remarks. – Macrobrachium jaroensis is characterized by the presence of the dense stiff setae at the cutting edges of the fingers, and the variable length of fingers, which are from shorter than palm to distinctly longer. It was originally described from Leytes, Philippines. Hwang & Yu (1982) reported it from Taiwan. Chace & Bruce (1993) recorded it from Cebu. The present study shows that it is quite common in the Philippines. Shy & Yu (1998) doubtfully referred some Taiwanese specimens to M. jeroensis . The re-examination of the Taiwanese specimens by the first author confirmed this identity.

Distribution. – Philippines, Taiwan.

Figures

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. 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.