Caridina, H. Milne Edwards, 1837

Cai, Yixiong, Ng, Peter K. L. & Choy, Satish, 2007, Freshwater Shrimps Of The Family Atyidae (Crustacea: Decapoda: Caridea) From Peninsular Malaysia And Singapore, Raffles Bulletin of Zoology 55 (2), pp. 277-309 : 279

Caridina typus H. Milne Edwards, 1837

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

Caridina typus – Yeo et al., 1999: 225; Wowor et al., 2004: 341, Fig. 5F .

Caridina exilirostris – Stimpson, 1860: 98 [type locality: Okinawa (Loo Choo) Island, Ryukyu Islands, Japan] (see Cai et al., 2006 for remaining synonyms).

Material examined. – Peninsular Malaysia: 136 specimens, ZRC

1998.873, Sungai Salang, Pulau Tioman, Malaysia, coll. Y. Cai et al., 25 Jun.1997; 12 specimens, ZRC 1998.874 , Tekek falls , Sungai Ayer Besar, Pulau Tioman, Malaysia, coll. P. K. L. Ng et al., 23 Jun.1997 ; 41 specimens, ZRC 1998.876 , Sungai Paya , coll. D. C. J. Yeo et al., 26 Jun.1997 ; 81 specimens, ZRC 1996.1766 , Sungai Ayer Besar , stream along Tekek-Juara trail, Pulau Tioman, Malaysia, coll. P. K. L. Ng et al., 24–25 Jun.1996 ; 4 specimens, ZRC 1996.1767 , Sungai Keliling , Pulau Tioman, Malaysia, coll. P. K. L. Ng et al., 27–28 Jun.1996 ; 1 specimen, ZRC 1996.1768 , Sungai Raya , Kampung Mukut, Pulau Tioman, coll. P. K. L. Ng et al., 26 Jun.1996 ; 6 specimens, ZRC 1996.1770 , pool between Sungai Mentawak and Sungai Keliling, Pulau Tioman, Malaysia, coll. P. K. L. Ng et al., 27–28 Jun.1996 ; 38 specimens, ZRC 1996.1771 , Sungai Nipah , Pulau Tioman, Malaysia, coll. D. C. J. Yeo et al., 28 Jun.1996 ; 104 specimens, ZRC 1996.1772 , Sungai Paya , Kampung Paya, Pulau Tioman, Malaysia, coll. P. K. L. Ng et al., 25–27 Jun.1996 ; 59 specimens, ZRC 1996.1773 , Kampung Paya , Sungai Pasal upstream (15 min walk from start of trail to Sungai Paya), near base of Bukit Paya, Pulau Tioman, Malaysia, coll. H. H. Tan et al., 17 Sep.1995 ; 49 specimens, ZRC 1996.1774 , Kampung Genting , Sungai Ayer Raja, Pulau Tioman, Malaysia, coll. P. K. L. Ng et al., 15 Sep.1995 ; 25 spec, ZRC 1996.1775 , Sungai Ayer Besar waterfall, on Tekek-Juara trail, Pulau Tioman, Malaysia, coll. P. K. L. Ng et al., 16 Sep.1995 ; 6 specimens, ZRC 1990.11841 – 11846 , ca. 100m a.s.l. waterfall stream south of Mukut waterfall, Pulau Tioman, Malaysia, S. S. C. Chong, 27 Jun.1985 ; 3 specimens, ZRC 2007.0334 , stream along Tekek-Juara path, Pulau Tioman, Malaysia, coll. S. S. C. Chong, 26 Jun.1985 ; 2 specimens ZRC 2007.0335 , stream behind Tanjung Said , Pulau Tioman, Malaysia, coll. A. Kamal et al., 27 Jun.1985 ; 2 males, cl 3.9–6.0 mm, 19 females, cl 4.8–6.2 mm, ZRC. 1998.875, Sungai Keliling , Pulau Tioman, Malaysia, coll. Y. Cai & N. K. Ng, 8–11 Sep.1998 ; 2 females, cl 4.6–5.7 mm, ZRC 2007.0326 , Kg. Juara, Pulau Tioman , Malaysia, coll. K. L. Lim & D. K. L. Lee, Sep.1992 ; 1 female, cl 3.9 mm, ZRC 2007.0327 , stream in Pulau Aur, Malaysia ; 1 female, cl 4.8 mm, ZRC 2007.0338 , Pulau Pemanggil, Malaysia, rocky stream, LMCJ 9628 ; 4 females, cl 2.6–3.4 mm, ZRC 2007.0339 , stream on southwest slope of eastern ridge, Pulau Redang , Terengganu, Malaysia, coll. K. Lim & N. Sivasothi, 23 Dec.1991 ; 1 male, cl 4.9 mm, 10 females, cl 5.5–6.0 mm, ZRC 2007.0340 , stream between Pasir Chayar Hutang and Teluk Kerma, Pulau Redang, Terengganu, Malaysia, coll. K. Lim et al., 23 Jun.1992 ; 6 males, cl 3.4–4.0 mm, 1 female, cl 4.5 mm, 2 ovigerous females, cl 4.4–4.8 mm, ZRC 2007.0341 , stream south west of Telok Kerma near Dalam, Pulau Redang, Malaysia, coll. K. Lim et al., 23 Jun.1992 .

Habitat. – Rivers or streams on islands or coastal areas.

Remarks. – Cai et al. (2006) recently designated a neotype for C. exilirostris Stimpson, 1860 from Okinawa, Ryukyu Islands, and regarded it as a junior synonym of Caridina typus. In Peninsular Malaysia, C. typus is only known from offshore islands (present study).

Distribution. – Widely distributed in the Indo-West Pacific (Cai et al., 2006).

Figures

Fig. 4. Caridina propinqua:A, B, cephalothorax and cephalic appendages; C, distal portion of telson; D, pre-anal carina; E, scaphocerite; F, first pereiopod; G, second pereiopod; H, third pereiopod; I, dactylus of third pereiopod; J, fifth pereiopod; K, dactylus of fifth pereiopod; L, diaeresis Scale bars: A, B, E = 1 mm; C, I, K, L = 0.2 mm; D, F–H, J = 0.5 mm. (A, female, cl 4.2 mm; B–K, female, cl 4.1 mm; all material from Sungei Buloh, Singapore, ZRC).

Fig. 5. Caridina propinqua: A, cephalothorax and cephalic appendages; B, pre-anal carina; C, scaphocerite; D, first pereiopod; E, second pereiopod; F, third pereiopod; G, dactylus of third pereiopod; H, fifth pereiopod; I, dactylus of fifth pereiopod; J, diaeresis. Scale bars: A, C = 1 mm; B, D–F, H = 0.5 mm; G, I, J = 0.2 mm. (female, cl. 3.7 mm, Sungei Mandai, Singapore, ZRC).