Caridina leclerci, Cai & Ng, 2009

Cai, Y. & Ng, P. K. L., 2009, The freshwater shrimps of the genera Caridina and Parisia from karst caves of Sulawesi Selatan, Indonesia, with descriptions of three new species (Crustacea: Decapoda: Caridea: Atyidae), Journal of Natural History 43 (17 - 18), pp. 1093-1114 : 1108-1110

Caridina leclerci sp. nov.

( Figure 9 )

Material examined

Holotype: male, cl 30.5 mm, MZB, SULS-217 , Pangea, cave at Tallasa, Maros, Sulawesi Selatan, coll. L. Deharveng, 25 August 1990 ; Paratypes: 2 males, cl 3.2– 3.3 mm, 6 females, cl 3.0– 3.7 mm, ZRC, same data as holotype. Others : 1 male, cl 3.6 mm, 1 female, cl 2.6 mm, 1 ovigerous female, cl 4.0 mm, RMNH, Gua Salukkan, Kallang Kappang, Maros , Sulawesi Selatan, coll. P. Leclerc, 21 August 1992 ; 2 males, cl 3.0– 3.1 mm, 7 females, cl 2.1–2.8 mm, 22 juveniles, RMNH, INDO-127 , small spring near Kappang , Sulawesi Selatan, coll. L. Deharveng, 11 July 1986 ; 3 males, cl 2.5–3.0 mm, 11 females, cl 2.5–4.0 mm, 1 ovigerous female, cl 4.1 mm, eggs 0.90 × 0.60 mm, ZRC SULA-038 , Maros, spring near Kappang , coll. L. Deharveng, 7 August 1988 ; 1 female, cl 4.4 mm, ZRC SULA-039 , Gua Salukkan Kallang, Maros , Sulawesi Selatan, coll. L. Deharveng, 7 August 1988 ; 1 male, cl 2.7 mm, ZMA Crus. 038, Gua Salukkan Kallang, Maros , Sulawesi, coll. C. Rahmadi, 11 July 2001 ; 9 males, cl 3.0– 3.9 mm, 16 females, cl 2.6–4.1 mm, 6 ovigerous females, cl 3.6– 3.9 mm, eggs 0.90 × 0.70 mm, ZMB Apr 02-16, Sumur Jodoh, CA Karaenta , Maros , Sulawesi, coll. C. Rahmadi, 1 May 2002 .

Description

Rostrum very short, slender, reaching slightly beyond end of eyestalk, unarmed. Antennal spine fused with inferior orbital angle; pterygostomian margin rounded.

Sixth abdominal somite 0.5 times length of carapace, 1.7 times as long as fifth somite, as long as telson. Telson 3.3 times as long as wide, not terminating in a projection, with four or five pairs of dorsal spinules and one pair of dorsolateral spinules; distal end with about four pairs of spines, lateral pair distinctly longer than intermediate pairs. Preanal carina high, without spine.

Eyes reduced, anterior end reaching to 0.4–0.5 times length of basal segment of antennular peduncle. Antennular peduncle 0.58 times as long as carapace; basal segment of antennular peduncle longer than second and third segment lengths, anterolateral angle reaching 0.3 times length of second segment, second segment distinctly longer than third segment. Stylocerite reaching to 0.7 times length of basal segment of antennular peduncle. Scaphocerite 3.0 times as long as wide.

Incisor process of mandible ending in irregular teeth, molar process truncated. Lower lacinia of maxillula broadly rounded, 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 ending in a triangular projection. Podobranch of second maxilliped normal. Third maxilliped reaching to end of scaphocerite, with ultimate segment as long as penultimate segment.

Epipod present on first two pereiopods, lacking on last three pereiopods. First pereiopod reaching to middle of second segment of antennular peduncle; merus 1.8 times as long as broad, shorter than carpus; carpus excavated anteriorly, shorter than chela, 1.4 times as long as high; chela 1.8 times as long as broad; fingers shorter than palm. Second pereiopod reaching to end of scaphocerite; merus shorter than carpus, 3.9 times as long as broad; carpus 1.3 times as long as chela, 5.3 times as long as high; chela 2.7 times as long as broad; fingers 1.3 times as long as palm. Third pereiopod reaching beyond end of scaphocerite by 0.7 times length of propodus, propodus 11 times as long as broad, 4.4 times as long as dactylus; dactylus 2.6 times as long as wide (spines included), terminating in one claw, with four or five accessory spines on flexor margin. Fifth pereiopod reaching to end of antennular peduncle, propodus 13 times as long as broad, 3.4 times as long as dactylus, dactylus 3.4 times as long as wide (spinules included), terminating in one claw, with 46–56 spinules on flexor margin.

Endopod of male first pleopod subrectangular, no appendix interna, 3.3 times as long as wide, 0.7 times length of exopod. Appendix masculina of male second pleopod 0.9 times length of endopod, with appendix interna 0.2 times length of appendix masculina.

Uropodal diaeresis with 24–26 movable spinules.

Habitat

Cave streams.

Etymology

The species is named after P. Leclerc, who collected some of the specimens for the current study.

Remarks

With regards to the structure of the rostrum, C. leclerci sp. nov., is most similar to C. sulawesi sp. nov. It differs from C. sulawesi by the longer antennular peduncle, 0.58 times as long as carapace versus 0.44 times in C. sulawesi ; the reduced eyes and the relatively longer pereiopods. The eyes are also distinctly smaller, suggesting that the species has more successfully adapted to the cave environment.

Distribution

Several locations of subterranean waters in Maros, Sulawesi Selatan.

Figures

Figure 9. Caridina leclerci sp. nov. (A) Cephalothorax and cephalic appendages, (B) telson, (C) distal portion of telson, (D) scaphocerite, (E) mandible, (F) maxillula, (G) maxilla, (H) first maxilliped, (I) second maxilliped, (J) first pereiopod, (K) second pereiopod, (L) third pereiopod, (M) dactylus of third pereiopod, (N) fifth pereiopod, (O) dactylus of fifth pereiopod, (P) endopod of male first pleopod, (Q) appendix masculine and appendix interna of male second pleopod, (R) preanal carina, (S) diaeresis. Scale bars: A, 1 mm; B, D–L, N, R, 0.5 mm; C, M, O–Q, S, 0.2 mm. (Holotype, male, cl 3.5 mm, ZMB, Sula-210, at Maros, Sulawesi.)