Caridina gracilirostris De Man, 1892

Cai, Y., 2006, Atyid shrimps (Crustacea: Decapoda: Caridea) of the Ryukyu Islands, southern Japan, with descriptions of two new species, Journal of Natural History 40 (38 - 40), pp. 2123-2172 : 2135-2137

Caridina gracilirostris De Man, 1892

Caridina gracilirostris De Man, 1892, p 399 (part), pl 25, fig. 31a–c [type locality: river near Maros , Sulawesi (Celebes), Indonesia].

Caridina gracilirostris: Shokita 2003, p 249 , fig. 18A.

Material examined

None.

Habitat

Lower reaches of rivers and streams which discharge to the sea.

Remarks

This species was recently reported by Shokita (2003). The single specimen on which Shokita’s (2003) record was based could not be located in the present study.

Distribution

Indo-West Pacific.

Caridina grandirostris Stimpson, 1860

Caridina grandirostris Stimpson, 1860, p 97 [type locality: Okinawa (Loo Choo) Island, Ruykyu Islands, Japan].

Caridina grandirostris: Hayashi 1989c, p 312 , fig. 169e; Shokita 2003, p 249, figs. 18B, 19F, 20K; Shokita et al. 2003a, p 101; Cai et al. 2006, p 397, figs. 4–6.

Material examined

Neotype: 1 male, cl 4.9 mm, NSMT, upper stream of Tima River, about 4 km from river mouth, Okinawa Island, Ryukyu Islands, coll. Y. Cai, N. K. Ng, T. Naruse and S. Islam, 11 June 2000. Others: 3 males, cl 3.2–3.8 mm, 1 female, cl 4.3 mm, 6 ovigerous females, cl 4.2– 5.3 mm, ZRC, 128 ° 02.489E 26 ° 33.489N, freshwater stream draining to a small patch of mangrove, Oura River , Okinawa Island, Ryukyu Islands , coll. Y. Cai, N. K. Ng, T. Naruse and S. Islam, 11 June 2000; 13 ovigerous females, cl 4.6–5.6 mm, 4 females, cl 3.6–4.6 mm, 10 males, cl 3.1–3.8 mm, ZRC 2004.0519 , 128 ° 04.609E 26 ° 33.429N, upstream of Tima River , about 1–2 km from river mouth, Okinawa Island, Ryukyu Islands , pH 7.4, coll. Y. Cai, N. K. Ng, T. Naruse and S. Islam, 11 June 2000; 46 males, cl 3.6–4.6 mm, 12 females, cl 3.6– 4.9 mm, 1 ovigerous female, cl 4.7 mm, ZRC 2004.0520 , 128 ° 05.529E 26 ° 33.639N, upstream of Tima River , about 3 km from the river mouth, Okinawa Island, Ryukyu Islands , pH 7.4, coll. N. K. Ng and S. Islam, 11 June 2000; 6 males, cl 3.8–5.1 mm, 12 females, cl 4.7–6.5 mm, 4 ovigerous females, cl 5.8–6.5 mm, ZRC 2004.0521 , upper stream of Tima River , about 4 km from river mouth, Okinawa Island, Ryukyu Islands , coll. Y. Cai, N. K. Ng, T. Naruse and S. Islam, 11 June 2000; 20 males, cl 3.5–4.4 mm, 1 female, cl 5.2 mm, 25 ovigerous females, cl 5.7–6.1 mm, ZRC 2004.0522 , 128 ° 07.049E 26 ° 36.619N, Arume River , Okinawa Island, Ryukyu Islands , coll. Y. Cai, N. K. Ng, T. Naruse and S. Islam, 11 June 2000; 8 males, cl 2.9– 4.0 mm, 10 females, cl 5.0– 5.6 mm, 15 ovigerous females, cl 5.0– 5.6 mm, ZRC 2004.0523 , 124 ° 15.269E 24 ° 30.119N, Gaburumata River , Ishigaki Island , Ryukyu Islands , pH 7.3, coll. Y. Cai and T. Naruse, 13 June 2000; 2 males, cl 3.6–4.1 mm, 1 female, cl 6.8 mm, 1 ovigerous female, cl 6.1 mm, ZRC 2004.0524 , 124 ° 09.809E 24 ° 24.429N, fast flowing stream, with pH 7.6 at one of the tributary of Nagura River , below reservoir, Ishigaki Island , Ryukyu Islands , coll. Y. Cai and T. Naruse, 13 June 2000; 2 males, cl 3.9–4.0 mm, 1 female, cl 5.6 mm, 1 ovigerous female, cl 5.3 mm, ZRC 2004.0525 , 124 ° 09.869E 24 ° 25.009N, fast flowing tributary of Nagura River , below a reservoir, Ishigaki Island , Ryukyu Islands , pH 7.2, coll. Y. Cai and T. Naruse, 13 June 2000; 1 female, cl 6.1 mm, ZRC 2004.0526 , 123 ° 51.849E 24 ° 23.659N, fast flowing water, about 200 m from sea, Omija River , Iriomote Island , Ryukyu Islands , coll. Y. Cai, N. K. Ng and T. Naruse , 15 June 2000; 1 male, cl 4.0 mm, ZRC 2004.0527 , fast flowing water, upper part of Omija River , Iriomote Island , Ryukyu Islands , coll. Y. Cai and T. Naruse , 15 June 2000; 6 males, cl 3.6–3.7 mm, 8 females, cl 4.8–5.5 mm, 3 ovigerous females, cl 5.0– 5.3 mm, ZRC 2004.0528 , 124 ° 33.769E 24 ° 17.819N, pH 7.7, Kara Stream , Ishigaki Island , Ryukyu Islands , coll. Y. Cai, N. K. Ng and T. Naruse , 17 June 2000; 1 male, cl 4.3 mm, ZRC 2004.0529 , Taiho River , Okinawa Island , Ryukyu Islands , coll. P. K. L Ng et al., 31 May 1998; 2 females, cl 5.0– 5.6 mm, 2 ovigerous females, cl 5.3–6.1 mm, ZRC 2004.0530 , Okuma River , Okinawa Island , Ryukyu Islands , coll. P. K. L. Ng et al., 31 May 1998.

Habitat

Lower reaches of rivers and streams which discharge to the sea.

Remarks

Cai et al. (2006) recently designated a neotype for C. grandirostris Stimpson, 1860 and redescribed it in detail.

Distribution

Caridina grandirostris has thus far only been reported from Japan.