Caridina, H. Milne-Edwards, 1837

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 : 2134-2135

Caridina typus H. Milne Edwards, 1837

Caridina typus H. Milne Edwards, 1837, p 363, Pl. 25, figs. 4, 5 [type locality: unknown].

Caridina typus: Kamita 1963, p 5, fig. 5; Shokita and Nishijima 1977, p 187; Hayashi, 1989c, p 310, fig.168; Shokita 2002, p 164; 2003, p 249, figs. 18G, 19C, 20L; Shokita et al. 2002b, p 76; Shokita et al. 2003a, p 101; 2003b, p 117; Cai and Anker 2004, p 236; Cai et al. 2006, p 412, figs. 13–15.

Caridina exilirostris Stimpson, 1860, p 98 [type locality: Okinawa (Loo Choo) Island, Ryukyu Islands, Japan].

Material examined

Syntypes: 3 females, cl 7.0– 8.4 mm, MNHN-Na 930, no date. Neotype of Caridina exilirostris : ovigerous female, cl 7.4 mm, NSMT, Okuma River, Okinawa Island, Ryukyu Islands, coll. P. K. L. Ng et al., 31 May 1998. Others: 3 females, cl 3.0– 3.2 mm, 4 males, cl 4.4– 4.7 mm, upstream of Nakama river , Iriomote Island , Ryukyu Islands , coll. M. Tomokuni, 3 November 1985; 1 female, cl 7.7 mm, upper of Kawauchi-gawa River , Amami-oshima Island , Ryukyu Islands , coll. M. Takeda, 15 July 1988; 1 female, cl 54 mm, URB1230 , Sumiyoh-gawa River , Amami-ohshima Island , Ryukyu Islands , coll. M. Takeda, 17 July 1988; 1 male, cl 4.8 mm, 1 ovigerous female, cl 6.9 mm, URB1112 , Shino-kawa River , Amami-oshima Island , Ryukyu Islands , coll. M. Takeda, 17 July 1988; 4 females, cl 5.4–6.8 mm, URB1182 , Kawauchi-gawa River , Amami-ohshima Island , Ryukyu Islands , coll. M. Takeda, 15 July 1988; 3 males, 4.9–5.9 mm, 4 females, cl 6.5–7.5 mm, 2 ovigerous females, cl 6.1–6.5 mm, URB1218 , Kawauchi-gawa River , Amami-ohshima Island , Ryukyu Islands , coll. Takeda, 18 July 1988; 1 male, cl 4.2 mm, 2 females, cl 4.8–5.2 mm, 2 ovigerous females, cl 5.2–5.6 mm, URB1135 , Kanyu-gawa River , Amami-ohshima Island , Ryukyu Islands , coll. M. Takeda, 16 July 1988 .

Habitat

Rivers and streams which discharge to the sea.

Remarks

Cai et al. (2006) recently designated a neotype for C. exilirostris Stimpson, 1860 from Okinawa Island, Ryukyu Islands, and synonymized it with Caridina typus. This is the most common species found from the Ryukyu Islands.

Distribution

Indo-West Pacific.