Atyid shrimps (Crustacea: Decapoda: Caridea) of the Ryukyu Islands, southern Japan, with descriptions of two new species Author Cai, Y. text Journal of Natural History 2006 2006-12-25 40 38 - 40 2123 2172 http://dx.doi.org/10.1080/00222930601084049 journal article 10.1080/00222930601084049 1464-5262 5232012 Caridina multidentata Stimpson, 1860 Caridina multidentata Stimpson, 1860 , p 98 [ type locality: Ogasawara (Bonin) Islands , Japan ]. Caridina multidentata : Chace 1997 , p 16 . Caridina japonica De Man, 1892b , p 261 , pl. IX, figs. 7, 8 [ type locality: Kagar , Hayagana , Japan ]. Caridina japonica : Kamita 1963 , p 8 , fig. 7; Shokita and Nishijima 1977 , p 189 ; Hayashi 1989c , p 229 , fig. 166a–h; Shokita 2003, p 250, figs. 18H, 19B, 20I; Shokita et al. 2002b , p 76 ; 2003b, p 117; Cai et al. 405, figs. 11, 12. (See Cai et al 2006 for synonym). Material examined Neotype : ovigerous female, cl 8.8 mm , NMST , from a stream in Tenno-ura, Chichi Jima Island, Ogasawara Islands, coll. K., Satake, 4 May 2000 . Lectotype of Caridina japonica De Man, 1892b , ZMA De 102876, Japan , coll. J. Anderson, 1881, 4 males , cl 7.8–8.2 mm , paralectotype of Caridina japonica De Man, 1892b , data same as lectotype ; 1 male , cl 8.8 mm , paralectotype , MNHN-Na 731, Kagar, Hayagana, Japan . Others: 1 female , cl 9.9 mm , NMST 1745, no data; 1 male , cl 7.5 mm , NMST 1121, upper part of Kawauchigawa River, Amami-oshima Island, Ryukyu Islands, coll M. Takeda, 15 July 1988 ; 1 ovigerous female, cl 7.9 mm , NMST 1754, Shino-Kawa River, Amami-oshima Island, Ryukyu Islands, coll. M. Takeda, 17 July 1988 ; 1 male , cl 8.3 mm , 2 ovigerous females, cl 7.3–9.8 mm , ZRC 2004.0537, Omija River, Iriomote Island, Ryukyu Islands, coll. T . Naruse, 1 August 1999 ; 1 ovigerous female, cl 8.2 mm , NMST , Amami-ohshima Island, Ryukyu Islands, 29 July 1992 ; 1 male , cl 16 mm , 2 ovigerous females, cl 10–12 mm , ZRC , 128 ° 15.319E 26 ° 39.949N , Arakawa River, Okinawa Island, Ryukyu Islands, coll. Y. Cai, N. K. Ng, T . Naruse and S. Islam, 11 June 2000 ; 1 female , cl 4.9 mm , ZRC , fast flowing water, upper part of Omija River, Iriomote Island, Ryukyu Islands, coll. Y. Cai and T . Naruse, 15 June 2000 ; 1 female , cl 9.5 mm , 2 ovigerous females, cl 6.2–9.8 mm , ZRC .2004.0539, Taiho River, Okinawa Island, Ryukyu Islands, coll. P. K. L. Ng et al., 31 May 1998 ; 1 female , cl 4.9 mm , ZRC 2004.0538, fast flowing water, upper part of Omija River, Iriomote Island, Ryukyu Islands, coll. Y. Cai and T . Naruse, 15 June 2000 . Habitat Lower reaches of rivers and streams which discharge to the sea. Remarks Cai et al. (2006) recently designated a neotype for C. multidentata Stimpson, 1860 from Ogasawara (Bonin) Islands and synonymized C. japonica De Man, 1892 with it. Distribution Caridina multidentata has been reported from Japan , Taiwan ( Hung et al. 1993 ), Fiji ( Choy 1991 ) and Madagascar ( Holthuis 1965 ).