Caridina weberi De Man, 1892

Mazancourt, Valentin de, Boseto, David, Marquet, Gerard & Keith, Philippe, 2020, Solomon’s Gold Mine: Description or redescription of 24 species of Caridina (Crustacea: Decapoda: Atyidae) freshwater shrimps from the Solomon Islands, including 11 new species, European Journal of Taxonomy 696, pp. 1-86 : 49-52

publication ID

https://doi.org/10.5852/ejt.2020.696

publication LSID

lsid:zoobank.org:pub:265EDD08-7AA8-4835-B7F6-353E7992633E

DOI

http://doi.org/10.5281/zenodo.4336364

persistent identifier

http://treatment.plazi.org/id/03D487FE-6B5B-5566-FDA5-7323FCA980D1

treatment provided by

Valdenar

scientific name

Caridina weberi De Man, 1892
status

 

Caridina weberi De Man, 1892  

Figs 2T View Fig , 15 View Fig , 26C View Fig

Caridina weberi De Man, 1892: 371   , pl. 22, fig. 23a (type locality: Kotting, Flores, Indonesia).

Caridina weberi   – Bouvier 1925: 242, figs. 562–571. — Roux 1928: 203–204. — Cai & Ng 2001: 666, fig. 3.

Caridina cf. weberi   sp. 2 – de Mazancourt et al. 2019a: 166 View Cited Treatment , 169–170.

Not Caridina weberi Edmondson, 1935: 8   ; figs 3a–f.

Material examined

Syntypes

INDONESIA • 2 ♂♂, cl 4.4–4.5 mm, 1 ♀ ovig., cl 6.1 mm; Flores Island , Kotting; Dec. 1888; M. Weber leg.; MNHN-IU-2015-1755   .

Other material

SOLOMON ISLANDS – Kolombangara Island • 1 ♀ ovig., cl 6.4 mm; Sulumuni River ; 08°02.253´S, 157°09.257´E; 148 m a.s.l.; 12 Nov. 2015; P. Keith, C. Lord and G. Marquet leg.; DNA voucher:

CA1516; MNHN-IU- 2018-2867. – Malaita Island • 1 ♂, cl 3.5 mm; Tanana River; 09°17.383´S, 167°07.012´E; 276 m a.s.l.; 16 Jun. 2015; D. Boseto leg.; DNA voucher: CA1511; MNHN-IU- 2018-2868   1 ♂, cl 3.7 mm; same collection data as for preceding; MNHN-IU- 2018-2869 • 1 ♂, cl 3.8 mm; same collection data as for preceding; MNHN-IU- 2018-2870   .

GoogleMaps  

PAPUA NEW GUINEA – New Britain • 1 ♂, cl 4.6 mm; Bereme village, Huvenganga River ; 05°45.187´S, 150°35.0014´E; 19 Oct. 2018; R. Causse, P. Keith and C. Lord leg.; MNHN-IU- 2018-2871 GoogleMaps   1 ♂, cl 5.3 mm; same collection data as for preceding; MNHN-IU- 2018-2872 GoogleMaps   1 ♀ ovig., cl 6.8 mm; same collection data as for preceding; MNHN-IU- 2018-2873 GoogleMaps   1 ♀ ovig., cl 7.5 mm; same collection data as for preceding; DNA voucher: CA2254; MNHN-IU- 2018-2874 GoogleMaps   1 ♀ ovig., cl 6.2 mm; Bereme district, Galaku River ; 05°45.187´S, 150°35.0014´E; 20 Oct. 2018; R. Causse, P. Keith and C. Lord leg.; MNHN-IU- 2018-2875 GoogleMaps   1 ♀ ovig., cl 6.5 mm; Bereme district, Wogan River ; 05°45.187´S, 150°35.0014´E; 21 Oct. 2018; R. Causse, P. Keith and C. Lord leg.; DNA voucher: CA2244; MNHN- IU- 2018-2876 GoogleMaps   .

Description

CEPHALOTHORAX. Suborbital angle indistinguishably fused with antennal spine. Pterygostomian margin rounded. Rostrum ( Fig. 15m View Fig ): straight, short, 0.4 of cl, reaching to base or near middle of second segment of antennular peduncle, armed with 11–23 teeth on dorsal margin, 0–2 of them situated on carapace behind orbital margin, ventral margin with 2–5 teeth. Eyes well developed, anterior end reaching to 0.7 times length of basal segment of antennular peduncle. Antennular peduncle 0.64 times as long as carapace. Anterolateral angle reaching 0.21 length of second segment, second segment longer than third segment. Stylocerite reaching to 0.75 length of basal segment of antennular peduncle.

PEREIOPODS. Epipods on first four pereiopods. P1 ( Fig. 15a View Fig ): chela about 2.0–2.3 times as long as wide, movable finger 2.6–4.1 times as long as wide, 0.8–1.5 times length of palm; carpus 1.4–2.0 times as long as wide. P2 ( Fig. 15b View Fig ) more slender and longer than first pereiopod, with chela 2.5–2.9 times as long as wide: movable finger 3.9–5.1 times as long as wide, 1.3–1.7 times length of palm; carpus slender, 4.8–5.5 times as long as wide. P3 ( Fig. 15c View Fig ): stout, dactylus ( Fig. 15e View Fig ) 2.8–37 times as long as wide (terminal spiniform seta included), with 6–8 spiniform setae on flexor margin in addition to terminal one; propodus 9.5–12.7 times as long as wide, 4.0–4.6 times as long as dactylus. P5 ( Fig. 15d View Fig ): dactylus ( Fig. 15f View Fig ) 3.9–5.2 times as long as wide, with 47–66 spiniform setae on flexor margin; propodus 13.3– 19.3 times as long as wide, 3.8–4.5 times as long as dactylus.

ABDOMEN. Third abdominal somite with moderately convex dorsal profile. Sixth abdominal somite about half length of carapace, 1.7 times as long as fifth somite, reaching 0.84 times length of telson.

TELSON ( Fig. 15i View Fig ). 2.6 times as long as wide, with five to seven pairs of dorsal spinules and one pair of dorsolateral spinules; posterior margin with median process, rounded, with 6–11 very long intermediate setae longer than one or two lateral ones.

MALE PLEOPODS. Pl1 ( Fig. 15j View Fig ): endopod of male subrectangular, 2.5 times as long as wide, reaching 0.40 lenght of endopod, with an appendix on distal outer margin which reaches beyond distal end of endopod on a short length. Pl2 ( Fig. 15k View Fig ): appendix masculina reaching 0.57 times length of endopod; appendix interna reaching 0.75 of appendix masculina.

PRE- ANAL CARINA ( Fig. 15g View Fig ). High, unarmed.

UROPODAL DIAERESIS ( Fig. 15h View Fig ). With 17–21 spinules.

EGGS. Ovigerous females with eggs size: 0.35–0.42 × 0.19–0.25mm.

Habitat

This species is largely rheophile and prefers fresh and well-oxygenated waters from the higher course of rivers (148–276 m a.s.l.).

Colour pattern ( Fig. 26C View Fig )

Body covered in small dots, several red stripes, sometimes with a white dorsal band running from the rostrum to the telson.

Distribution

This species occurs in Indonesia (Sumba, Halmahera), Papua New Guinea (New Britain) and the Solomon Islands (Kolombangara and Malaita).

Remarks

Our specimens fit well with the types, described by De Man (1892) from Flores, by its P1 carpus 1.4–2.0 times as long as wide (vs 1.9–2.1 in type specimens); by its P2 carpus 4.8–5.5 times as long as wide (vs 4.9–5.4); by its P3 dactylus 2.8–3–7 times as long as wide (terminal spiniform seta included) (vs 3.2) with 6–8 spiniform setae on the flexor margin in addition to the terminal one (vs 6–7), propodus 9.5–12.7 times as long as wide (vs 9.0), 4.0–4.6 times as long as dactylus (vs 3.5–3.9): by its P5 dactylus 3.9–5.2 as long as wide (vs 4.6) with 47–66 spiniform setae on the flexor margin (vs 60–65), propodus 13.3–19.3 times as long as wide (vs 15.6) and 3.8–4.5 times as long as dactylus (vs 3.6); by its telson with one or two pairs of setae, lateral pair of setae distinctly longer than sublateral pair, both shorter than 6–11 intermediate setae (vs 8); by its eggs size 0.35– 0.42 × 0.19–0.25 mm (vs 0.39–0.40 × 0.23–0.26 m).

Our specimens are also similar to C. weberi   as described by Cai & Ng (2001) from Halmahera ( Indonesia) in the shape of the rostrum, which is straight, reaching to base or near middle of second segment of antennular peduncle (see Fig. 3 View Fig A–B) with 0–2 teeth situated on carapace behind orbital, and also by its telson with two pairs of setae, lateral pair of setae distinctly longer than sublateral pair, both shorter than intermediate setae (see Fig. 3 View Fig C–E), its P5 dactylus with 47–66 spiniform setae on flexor margin (vs 55 according to Cai & Ng (2001)), and by its eggs size 0.35– 0.42 × 0.19–0.25 mm (vs 0.4– 0.2 mm). However, the rostrum has more teeth (0–2) 11–23/2–5 (vs (1–2) 13–14/2–3), P1 carpus longer 1.4–2.0 (vs 1.3), P5 propodus 3.8–4.5 times as long as dactylus (vs 5.0). We consider the observed differences to be within an intra-specific range.

It is also similar to C. weberi   as described by Roux (1928) from Sumba by its rostrum formula (0–2) 11–23/2–5 (vs (1–2) 12–19/2–6 according to Roux (1928)), by its P1 carpus 1.4–2.0 times as long as wide (vs 1.5–2.1), its chela about 2.0–2.3 times as long as wide (vs 2–2.1), its P2 carpus 4.8–5.5 times as long as wide (vs 5–5.7), its P2 chela about 2.5–2.9 times as long as wide (vs 2.8–3.1), its P3 dactylus 2.8–3.7 times as long as wide (terminal spiniform seta included) (vs 3.1–3.8), with 6–8 spiniform setae on flexor margin in addition to the terminal one (vs 6–7), its P3 propodus 4.0–4.6 times as long as dactylus (vs 4.5–5.4), P5 dactylus 3.9–5.2 as long as wide (vs 4.4–5), with 47–66 spiniform setae (vs 62–70) on flexor margin, and its eggs size 0.35–0.42 × 0.19–0.25 mm (vs 0.35–0.38 × 0.20–0.21 mm). However, its P5 propodus is longer 3.8–4.5 times as long as the dactylus (vs 3.4–3.6). We think that the observed differences are also within an intra-specific range.

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Atyidae

Genus

Caridina

Loc

Caridina weberi De Man, 1892

Mazancourt, Valentin de, Boseto, David, Marquet, Gerard & Keith, Philippe 2020
2020
Loc

Caridina weberi

Edmondson C. H. 1935: 8
1935
Loc

Caridina weberi

Cai Y & Ng P. K. L. 2001: 666
Roux J. 1928: 203
Bouvier E. L. 1925: 242
1925
Loc

Caridina weberi

De Man J. G. 1892: 371
1892