Caridina temasek Choy & Ng, 1991

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 : 297-301

publication ID

https://doi.org/ 10.5281/zenodo.5333541

persistent identifier

https://treatment.plazi.org/id/0386A025-694C-5E2C-A7D8-FA9AC203D77B

treatment provided by

Diego

scientific name

Caridina temasek Choy & Ng, 1991
status

 

Caridina temasek Choy & Ng, 1991 View in CoL

( Figs. 13 View Fig , 14 View Fig )

Caridina cf. babaulti Johnson, 1961:136 , Fig.21–24 [not Caridina babaulti Bouvier, 1918 )

Caridina sp. Ng, 1990: 200 ; Ng & Tan, 1991: 120.

Caridina temasek Choy & Ng, 1991: 265 View in CoL , Figs.1–5 View Fig View Fig View Fig View Fig View Fig [type locality: Forest stream in Sime road, Singapore]; Wowor et al., 2004:343, Fig. 7I View Fig .

Material examined. – Holotytpe: ovigerous female, cl 3.5 mm, ZRC 2007.0396, Sime Road, Singapore, coll. P. K. L. Ng & K. K. P. Lim, Aug.1990. Others : Singapore : 3 males, cl 2.6–2.7 mm, 1 ovigerous female, cl 3.9 mm, eggs 0.85 × 0.60 mm, Sime Road , forest stream, coll. K. Yong, & K. L. Yeo, 17 Apr.1990 ; 3 males, cl 2.1–2.3 mm, 2 females, cl 3.0– 3.2 mm, 3 ovigerous females, cl 3.0–4.0 mm, Stream in Sime Road , Singapore, coll. Y. Y. Lim, 19 Apr.1990 . Malaysia: 5 males, cl 2.3–2.7 mm , 7 females, cl 2.7–3.1 mm, 6 ovigerous females, 2.8–3.7 mm, Sungai Semalok , between Mawai & Tg. Sedili, Johor, Malaysia, coll. P. K. L. Ng, 22 Apr.1992 ; 3 males, cl 2.1–2.4 mm, 6 females, cl 2.6–3.5 mm, 14 ovigerous females, cl 3.1–3.8 mm, stream after K. Brang towards Kuala Terengganu, Malaysia, pH 5.7, 25.9 C, coll. P. K.L. Ng, 19 Mar.1992 ; 1 male, cl 3.5 mm, Sekayu Waterfall , Malaysia, coll. H. H. Tan, 17 Jun.1995 ; 2 specimens, Johor, Kota Tinggi , Sungai Mupor, along Johor Bahru-Kuantan highway, Malaysia, coll. M. Kottelat & K. Lim, 22 Jan.1991 ; 1 male, cl 2.4 mm, 1 ovigerous female, cl 3.5 mm, Sungai Ambat , 61 km from Kota Tinggi on road to Mersing, Johor, Malaysia, coll. M. Kottelat & P. K. L. Ng, 24 Jul.1992 ; 2 females, cl 2.8–3.3 mm, 1 ovigerous female, cl 3.2 mm, ZRC.1979.4.17.67–69, Mawai, Malaysia, 9 Oct.1959 ; 2 females, cl 3.2–3.8 mm, 4 ovigerous females, cl 3.7–4.0 mm, Sungai Machap , under bridge between Air Hitam and Simpang, Johor, Malaysia, coll. Renggam, 18 Aug.1991 ; 4 females, cl 2.5–2.8 mm, 3 ovigerous females, cl 2.7–3.1 mm, Gunung Panti , Kota Tinggi, Malaysia, coll. P. K. L. Ng, 1991 ; 5 males, cl 2.0–2.2, 12 females, cl 2.4–3.4 mm, 12 ovigerous females, cl 2.7–3.4 mm, stream on logging track, Gunung Panti, Johor, Malaysia, no date ; 8 specimens, blackwater stream, Batu Arang , Kuala Lumpur, Malaysia, coll. S. Choy et al., 6 Nov.1991 ; 1 ovigerous female, cl 4.7 mm, ZRC 1995.507 View Materials , Johor, Sungai Semberong , Malaysia, coll. C. Yong, 13 Apr.1990 ; 2 females, cl 3.0– 3.2 mm, 1 ovigerous female, cl 2.8 mm, slow out flow stream of Lake Chin Chin , Malacca, Malaysia, coll. D. S, Johnson, 29 Oct.1963 ; 1 female, cl 3.5 mm, Mawai , Johor, Malaysia, 18 Jul.1961 ; 1 female, cl 3.1 mm, ZRC 1979.4 View Materials .11.1, S. Semalok, 9 miles from Kota Tinggi , Mawai Road, Malaysia, coll. D. S. Johnson, 1 Apr.1961 ; 4 females, cl 2.5–3.0 mm, ZRC 1979.4.11.7–10, slow outflow stream of Lake Chin Chin , Malacca, Malaysia, 29 Oct.1963 ; 1 ovigerous female, cl 3.5 mm, one female, in poor condition, ZRC 1979.4 View Materials .11.12, outflow stream of Ayer Keroh Reservoir , Malacca, Malaysia, coll. D. S. Johnson, 6 Jan.1956 ; 2 males, cl 2.7–2.8 mm, 4 females, cl 3.3–3.9 mm, 5 ovigerous females, cl 3.0– 3.7 mm, Malaysia , 2 males, cl 2.7–2.8 mm, 4 female, cl 3.3–3.9 mm, 5 ovigerous females, cl 3.0– 3.7 mm, Perak, Malaysia, H. H. Ng, 16 Jun.1997 .

Comparative material examined. – Southern Thailand: 8 males, cl 20–25 mm , 18 females, cl 2.4–3.3 mm, ZRC 2007.0408 View Materials , Narathiwat Province, stream at bridge about 1 km south of bridge on Mae Nam Road Tod Deng , about 5 km north of Narathiwat, coll. M. Kottelat, 3 Nov.1995 ; 1 female, cl 3.4 mm, ZRC 2007.0409 View Materials , Narathiwat Province, 10 km north of Bocho on Road Narathiwat-Sai Buri , coll. M. Kottelat, 1 Nov.1995 ; 1 male, cl 2.0 mm, 6 females, cl 1.8–3.0 mm, 3 ovigerous females, cl 2.9–3.9 mm, CU2000.03; 1 ovigerous female, cl 3.0 mm, CU2000.07; 1 ovigerous female, cl 2.7 mm, CU2000.08; 12 females, cl 2.9–3.7 mm, ZRC 2007.0410 View Materials ; Thailand: Mae Sot, Mae Nam Moi , border with Myanmar , Karen State , 16°41.22'N 98°30.90'E, coll. H. H. Tan, 26 May 1999 GoogleMaps ; 16 females, cl 2.6–3.7 mm, 1 ovigerous female, cl 3.2 mm, ZRC 2007.0411 View Materials , Thailand: south Thailand, Songkhla Province, Nam Tok Khao Chong , km 25 on road to Trang from Phattalung, 07°39.71'N 100°02.33'E, coll. H. H. Tan et al., 26 Oct.1998 GoogleMaps . Borneo : 19 males, cl 2.0– 2.4 mm, 15 females, cl 2.3–3.4 mm, 9 ovigerous females, cl 3.0– 3.6 mm, ZRC 2007.0412 View Materials , Kalimantan Barat, Kabupaten Pontianak: Sungai Belado , clear water hill stream, at base of Gg Kloncet , at km 67 on Pontianak on Patiana-Anjungan road, Kg. Anjungan, 00°21.02'N 109°11.08'E, coll. H. H. Tan et al., 28 Apr.1998 GoogleMaps ; 3 ovigerous females, cl 3.1–3.5 mm, ZRC 2007.0413 View Materials , Kalimantan Barat, Kabupaten Sanggau: clear fast flowing stream at km 249 Pontianak on Sosok-Sanggau road, 00°09.64'N 110°29.46'E, H. H. Tan et al., 26 Apr.1998 GoogleMaps ; 1 male, cl 2.6 mm, ZRC 2007.0414 View Materials , Kalimantan Barat, Kabupaten Sanggau: blackwater stream at km 352 Pontianak on Sekadau-Sintang road, 00°00.44'N 111°14.38'E, coll. H. H. Tan et al., 25 Apr.1998 GoogleMaps ; 1 male, cl 2.1 mm, 25 females, cl 2.0– 3.4 mm, 12 ovigerous females, cl 3.1–4.0 mm, eggs 0.8–9.3 × 0.6 mm, ZRC 2007.0415 View Materials , Kalimantan Barat, Kabupaten Pontianak: clear water hill stream and paddy ditch at base of Gg. Semahung, ca. 13.8 km into side road from Pahuman , 00°14.79'N 109°11.08'E, pH 6.6, coll. H. H. Tan, 27 Apr.1998 GoogleMaps ; 2 females, cl 2.8–4.2 mm, ZRC 2007.0416 View Materials , Kalimantan Barat, Kabupaten Pontianak: Sungai Belado , clear water hill stream ar base of Gg. Kloncet at km 67 Pontianak on Pontianak-Anjungan road, Kg. Anjungan , 00°21.02'N 109°11.08'E, pH 6.6, coll. H. H. Tan et al., 28 Apr.1998 GoogleMaps ; 1 ovigerous female, cl 3.5 mm, ZRC 2007.0417 View Materials , Kapuas, Kalimantan Barat, Desa Tekalong , rocky stream 37.8 km (39km milestone to Putussibau ) from Putussibau , rubber plantation, 8–10m in width, 0.5–1 m in depth, hard bank with patches of grasses, sand to big gravel substrat, fast flowing clear mountain stream, cool water, 00°34'22.1"N 112°50'36.8"E, coll. Y. Y. Goh, 8 May 1998 GoogleMaps ; 12 females, cl 3.0– 3.7 mm, 7 ovigerous females, cl 3.8–4.1 mm, eggs 0.9 × 0.6 mm, ZRC 2007.0418 View Materials , Sungai Kubas, Sarawak, Borneo , coll. P. K. L. Ng, 25 Jun.1999 ; 23 females, cl 2.4–4.1 mm, 34 ovigerous females, cl 3.3–3.7 mm, ZRC 2007.0419 View Materials , Kalimantan Barat, Kabupaten Sintang: clear flowing stream ca. 2–3 km before Nanga sayan on Nanga Pinoh-Nanga Sayan road, 00°42.15'S 111°41.50'E, coll. H. H. Tan et al., 24 Apr.1998 GoogleMaps ; 11 females, cl 2.7–3.7 mm, 2 ovigerous females, cl 3.0–4.0 mm, ZRC 2007.0420 View Materials , Sungai Temunyuk, small sandy-rocky stream 67.8km (69 km milestone) from Putussibau , rubber plantation, sand and mud bank with grass, fast flowing at some places, 1–5 m in width, 0.5–1 m in depth, clear water, 00°27'42.2"N 112°38'45.7"E, pH 6.8, coll. Y. Y. Goh, 8 May 1998 GoogleMaps ; 1 male, cl 2.8 mm, 6 females, cl 2.7–3.7 mm, 11 ovigerous females, cl 3.3–3.8 mm, ZRC 2007.0421 View Materials , Kalimantan Barat, Kabupaten Sanggau, clear water stream at km 325 Pontianak on Sekadau-Sintang road, at Gonis Butun , Kec. Sekadau Ilir , 00°01.97'N 111°06.91'E, pH 6.0, coll. H. H. Tan, 25 Apr.1998 GoogleMaps ; 9 females, cl 3.0–4.0 mm, 6 ovigerous female, cl 3.3–3.6 mm, Borneo, Sarawak: Bau , stream next to Fairy Caves , coll. P. K. L. Ng, 24 Jun.1996 ; 6 females, cl 3.6–4.1 mm, 4 ovigerous females, cl 3.4–4.0 mm, ZRC 2007.0422 View Materials , Borneo, Sarawak: Sungai Kuhas tributary (feeder stream) 0.5km towards Kg. Lanchang, 6.9 km left at Tebelu Tebakang turnoff, 5.8 km into right trail, 1°09'23.1"N 110°29'29.9"E, coll. H. H. Tan, 31 Aug.1996 GoogleMaps ; 2 females, cl 3.2–3.7 mm, ZRC 2007.0423 View Materials , Sarawak, no date ; 6 females, cl 2.9–3.2 mm, 13 ovigerous females, cl 3.4–3.8 mm, ZRC 2007.0424 View Materials , Kalimantan Timur, Sungai Semayang at Desa Semayang , coll. H. H. Tan & D. Wowor, 8 Nov.1999 .

Description. – Rostrum ( Figs. 13A View Fig , 14A, B View Fig ) straight, or slightly sigmoid, reaching near end of basal segment of antennilar peduncle or slightly beyond end of second segment. Rostral formula: 4–6+10–14/2–6. Suborbital angle acute, distinctly separated from antennal spines; pterygostomian margin rounded.

Sixth abdominal somite 1.5 times as long as high, 0.6 times length of carapace, 1.6 times as long as fifth somite, slightly shorter than telson. Telson ( Fig. 14C View Fig ) 3.0 times as long as wide, distal margin rounded, not terminating in a projection, with 3 to 4 pairs of dorsal spinules and one pair of dorsolateral spinules; distal end with 3 or 4 pairs of spines, lateral pair slightly longer than intermediate pairs. Preanal carina ( Fig. 13I View Fig ) triangular, no spine or with a very tiny spine.

Eyes well developed, anterior end reaching to 0.7 times length of basal segment of antennular peduncle.Antennular peduncle 0.8 times as long as carapace; basal segment of antennular peduncle longer than combined length of second and third segments, anterolateral angle reaching to 0.3 times length of the second segment, second segment distinctly longer than third segment. Stylocerite reaching to 0.8 times length of basal segment of antennular peduncle. Scaphocerite 3.6 times as long as wide.

Incisor process of mandible ending in irregular teeth, molar process truncated. Lower lacinia of maxillula broadly rounded, subtriangular, upper lacinia elongated, with a number of distinct teeth on inner margin, palp slender. Upper endites of maxilla subdivided, palp short, scaphognathite tapering posteriorly with numerous long, curved setae at posterior end. Palp of first maxilliped ( Fig. 13B View Fig ) ending in a fingerlike projection. Second maxilliped typical, podobranch well developed. Third maxilliped reaching to end of scaphocerite, with ultimate segment shorter than penultimate segment.

Epipods well developed on first 2 pereiopods, reduced in third and fourth. First pereiopod ( Figs. 13C View Fig , 14E, F View Fig ) reaching to end of basal segment of antennular peduncle; merus 2.6 times as long as broad, slightly shorter than carpus; carpus excavated anteriorly, shorter than chela, 3.1 times as long as high; chela 2.9 times as long as broad; fingers 1.4 times as long as palm. Second pereiopod ( Figs. 13D View Fig , 14G View Fig ) reaching beyond end of second segment of antennular peduncle; merus shorter than carpus, 5.4 times as long as broad; carpus 1.4 times as long as chela, 7.2 times as long as high; chela 3.8 times as long as broad; fingers 1.3 times as long as palm. Third pereiopod ( Figs. 13E, F View Fig , 14H, I View Fig ) reaching to end of scaphocerite, propodus 13 times as long as broad, 4.1 times as long as dactylus; dactylus 4.3 times as long as wide (spines included), terminating in a claw, with 8 accessory spines on flexor margin. Fifth pereiopod ( Figs. 13G, H View Fig , 14J, K View Fig ) reaching to end of second segment of antennular peduncle, propodus 14 times as long as broad, 2.8 times as long as dactylus; dactylus slender, 5.2 times as long as wide (spinules included), terminating in a claw, with 55–72 spinules on flexor margin.

Endopod of male first pleopod subtriangular, twice as long as wide, reaching to 1/4 length of endopod, appendix interna reaching beyond end of endopod by most of its length. Appendix masculina of male second pleopod slender, reaching to half length of exopod.

Uropodal diaeresis ( Fig. 14L View Fig ) with 12–16 movable spinules.

Ovigerous females with egg size 0.70–0.85 × 0.44–0.54 mm.

Habitat. – Streams and lakes.

Remarks. – In the form of the rostrum, slender pereiopods and egg size, C. temasek can easily be confused with C. excavatoides and C. tonkinensis . But it can readily be differentiated from the latter two species by the structure of the endopod of the male first pleopod, which has a distinct appendix interna (vs. absent).

Johnson (1961) doubtfully referred one ovigerous female and one non-ovigerous female “from a rather fast stream flowing out of Ayer Keroh Reservoir, Malacca ” to C. babaulti . According to his description, they seem to belong to the present species; and a re-examination of the specimens (ZRC 1979.4.11.12) confirms this. Caridina temasek can readily be distinguished from C. babaulti by the absence of a pterygostomian spine. The present study shows that C. temasek has a wider distribution than previously recorded from southern Thailand at the north to the West Kalimantan, Indonesia in the south.

Distribution. – The Malay Peninsula, Sarawak and West Kalimantan (present study).

ZRC

Zoological Reference Collection, National University of Singapore

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Atyidae

Genus

Caridina

Loc

Caridina temasek Choy & Ng, 1991

Cai, Yixiong, Ng, Peter K. L. & Choy, Satish 2007
2007
Loc

Caridina temasek Choy & Ng, 1991: 265

Wowor, D 2004: 343
Ng, P 1991: 265
1991
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