Caridina pareparensis De Man, 1892

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 : 1095-1099

Caridina pareparensis De Man, 1892

( Figures 1 , 2 )

Caridina pareparensis De Man 1892, p. 379 , pl. 22: fig. 25–25b [type locality: near Parepare , Sulawesi (Celebes), Indonesia].

Caridina pareparensis: Bouvier 1925, p. 236 , figs 538–543; Chace 1997, p. 18.

Material examined

Lectotype: ovigerous female, cl 3.4 mm, eggs 0.9 × 0.6 mm, syntype of C. pareparensis De Man, 1892 , ZMA De 102630, river near Pare Pare, Sulawesi, Indonesia, coll. M. Weber, 1888 . Paralectotype: 10 males, cl 2.0– 2.4 mm, 15 females, cl 2.4–4.4 mm, data same as lectotype. Others : 1 male, cl 3.7 mm, 3 females, cl 2.8–3.8 mm, ZMB Crust 040- 043, Gua Assuloang, Balocci , Pangkajene , Maros , Sulawesi, coll. L. Deharveng and A. Bedos, 17 August 2001 ; 2 females, cl 2.8–3.2 mm, ZMB Crus 039, Gua Assuloang, Balocci , Pangkajene , Maros , Sulawesi, coll. L. Deharveng and A. Bedos, 17 August 2001 ; 2 males, cl 2.6 mm, 1 female, cl 2.8 mm, ZMB Crus 026-028, Gua Assuloang, Balocci , Pangkajene , Maros , Sulawesi, coll. L. Deharveng and A. Bedos, 17 August 2001 ; 39 males, cl 1.8–2.8 mm, 30 females, cl 2.1–3.1 mm, 2 ovigerous females, cl 3.2, 3.3 mm, 4 juveniles, ZMB Apr-02-06, Spring of Balangajea, Maros , Sulawesi, coll. Y. Suhardjono and C. Rahmadi, 30 April 2002 ; 9 males, cl 2.0– 2.6 mm, 6 females, cl 2.3– 3.6 mm, 3 ovigerous females, cl 2.8–3.5 mm, eggs 0.8 × 0.5 mm, 7 juveniles, ZMB Apr- 02-08, Spring of Rumbia, Maros , Sulawesi, coll. Y. Suhardjono and C. Rahmadi, 21 April 2002 ; 1 male, cl 2.3 mm, 1 ovigerous female, cl 2.8 mm, 2 juveniles, ZMB Apr 02- 10, entrance of Gua Baharuddin, Maros , Sulawesi, coll. Y. Suhardjono and C. Rahmadi, 13 April 2002 ; 24 specimens (1 ovigerous) in poor condition, ZMB Apr-02- 11, Spring of Samanggi, Maros , Sulawesi, coll. Y. Suhardjono and C. Rahmadi, 29 April 2002 ; 1 male, cl 2.2 mm, 2 females, cl 2.8–2.9 mm, 1 ovigerous female, cl 4.2 mm, eggs 1.0 × 0.6 mm, ZMB Apr 02-15, Bantimurung River , coll. Y. Suhardjono and C. Rahmadi, 13 April 2002 ; 6 males, cl 1.9–3.4 mm, 7 females, cl 2.2–3.3 mm, Kawasan Obyek Wisata, Bantimurung, Maros , Sulawesi, coll. Y. Cai, 29 December 2004 .

Description

Rostrum reaching near end of basal segment of antennular peduncle, or near end of second segment of antennular peduncle, dorsal margin nearly horizontal, or slightly sigmoid, rostral formula: 324+9215/023. Antennal spine fused with inferior orbital angle; pterygostomian margin rounded.

Sixth abdominal somite 0.48–0.53 times length of carapace, 1.8–1.9 times as long as fifth somite, as long as telson. Telson 3.0 times as long as wide, not terminating in a projection, with four pairs of dorsal spinules and one pair of dorsolateral spinules; distal end with about three to four pairs of spines, lateral pair slightly longer than intermediate pairs. Preanal carina high, without spine.

Eyes well developed, anterior end reaching to 0.7 times length of basal segment of antennular peduncle. Antennular peduncle 0.70–0.73 times as long as carapace; basal segment of antennular peduncle longer than sum of second and third segment lengths, anterolateral angle reaching 0.20–0.25 times length of the second segment, second segment distinctly longer than third segment. Stylocerite reaching 0.8 times length of basal segment of antennular peduncle. Scaphocerite 3.4–3.7 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 reduced to a lamina. Third maxilliped reaching to end of second segment of antennular peduncle, with ultimate segment longer than penultimate segment.

Epipods well developed on first two pereiopods, reduced on third, rudimentary. First pereiopod reaching to distal end of basal segment of antennular peduncle; merus 2.5 times as long as broad, longer than carpus; carpus excavated anteriorly, shorter than chela, 1.4–1.7 times as long as high; chela 1.9–2.0 times as long as broad; fingers slightly shorter than, or as long as palm. Second pereiopod reaching to end of antennular peduncle; merus distinctly shorter than carpus, 2.7–3.3 times as long as broad; carpus as long as chela, 4.3–4.9 times as long as high; chela 1.7–2.5 times as long as broad; fingers slightly longer than palm. Third pereiopod reaching beyond end of scaphocerite by its dactylus, propodus 10 times as long as broad, 4.0 times as long as dactylus; dactylus 2.7 times as long as wide (spines included), terminating in two claws, with six accessory spines on flexor margin. Fifth pereiopod reaching to end of second segment of antennular peduncle, propodus 13 times as long as broad, 3.3 times as long as dactylus, dactylus 3.2 times as long as wide (spinules included), terminating in one claw, with 43 spinules on flexor margin.

Endopod of male first pleopod subrectangular, no appendix interna, 2.9 times as long as wide, half length of exopod. Appendix masculina of male second pleopod reaching to 0.8 times the length of endopod, with appendix interna 0.2 times as long as appendix masculina.

Uropodal diaeresis with 18–20 movable spinules.

Eggs 0.9021.0 × 0.60 mm in diameter.

Habitat

Rivers, cave streams.

Remarks

When De Man (1892) originally described C. pareparensis , he pointed out that his new species was similar to C. laevis Heller, 1862 , from Java. It, however, can be distinguished from the latter by the dactylus of the third pereiopod, which does not show sexual dimorphism as in C. laevis , and the shorter dactylus of the fifth pereiopod (propodus 3.3 times as long as dactylus versus 2.0–2.3 times in C. laevis ) and the smaller number of spinules on the dactylus of the fifth pereiopod (43 versus 80–95 in C. laevis ).

Cai and Ng (2001) doubtfully assigned a damaged female specimen from Halmahera, Indonesia, to C. pareparensis . This specimen has recently been described as C. macrodentata Cai and Shokita, 2006 .

Caridina pareparensis was known previously only from the type locality, a river near Pare Pare. The materials on which the current record is based were collected from several locations in Maros, Sulawesi in both surface and subterranean waters.

Distribution

Southern Sulawesi, Indonesia.

Figures

Figure 1. Caridina pareparensis. (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) third maxilliped, (K) pereiopod, (L) second pereiopod, (M) third pereiopod, (N) dactylus of third pereiopod, (O) fifth pereiopod, (P) dactylus of fifth pereiopod, (Q) endopod of male first pleopod, (R) appendix masculine and appendix interna of male second pleopod, (S) preanal carina, (T) diaeresis. Scale bars: A, D, 1 mm; B, E–M, O, S, 0.5 mm; C, N, P–R, T, 0.2 mm. (Syntypes, A–P, S,T, ovigerous female, cl 3.4 mm, egg size 0.9×0.6 mm; Q, R, male, cl 2.6 mm, BNHM.)

Figure 2. Caridina pareparensis. (A) Cephalothorax and cephalic appendages, (B) telson, (C) distal portion of telson, (D) scaphocerite, (E) first maxilliped, (F) second maxilliped, (G) third maxilliped, (H) first pereiopod, (I) second pereiopod, (J) preanal carina, (K) diaeresis. Scale bars: A, D, 1 mm; B, E–J, 0.5 mm; C, K, 0.2 mm. (Female, cl 3.0 mm, ZRC, Kabupaten Maros, above Bantimurung water fall, southern Sulawesi, Indonesia.)