Caridina pisuku, Mazancourt & Boseto & Marquet & Keith, 2020

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: 30-33

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.4336390

persistent identifier

http://treatment.plazi.org/id/C2046392-256D-4485-8E85-8E94B9A37FF8

taxon LSID

lsid:zoobank.org:act:C2046392-256D-4485-8E85-8E94B9A37FF8

treatment provided by

Valdenar

scientific name

Caridina pisuku
status

sp. nov.

Caridina pisuku   sp. nov.

urn:lsid:zoobank.org:act:C2046392-256D-4485-8E85-8E94B9A37FF8

Figs 2M View Fig , 9 View Fig

C. longirostris   – Page et al. 2007: 647 (GenBank: DQ478506 View Materials DQ478507 View Materials ).

Caridina   sp. 3 Solomon – de Mazancourt et al. 2019a: 166, 169–170.

Etymology

Named after the river Pisuku, in Choiseul Island, the type locality where this new species occurs. The name is used as a noun in apposition.

Material examined

Holotype

SOLOMON ISLANDS – Choiseul Island • ♂, cl 3.7 mm; Choiseul Island, Pisuku River , sector 1; 06°58.951´S, 156°46.582´E; 15 m a.s.l.; 10 Oct. 2014; P. Gerbeaux, P. Keith and G. Marquet leg.; MNHN-IU-2014-20862. GoogleMaps  

Paratypes

SOLOMON ISLANDS • 1 ♂, cl 3.7 mm; same collection data as for holotype; MNHN-IU-2014-20863 GoogleMaps   1 ♀ ovig., cl 5.6 mm; same collection data as for holotype; DNA voucher: CA1282; MNHN- IU-2014-20864 GoogleMaps   1 ♀ ovig., cl 5.8 mm; same collection data as for holotype; DNA voucher: CA1347; MNHN-IU-2014-20865 GoogleMaps   1 ♀, cl 4.8 mm; same collection data as for holotype; MNHN-IU-2014-20866 GoogleMaps   1 ♀, cl 5.0 mm; same collection data as for holotype; MNHN-IU-2014-20867 GoogleMaps   1 ♀, cl 5.1 mm; same collection data as for holotype; MNHN-IU-2014-20868 GoogleMaps   1 ♀, cl 5.0 mm; Pisuku River , sector 2; 06°58.900´S, 156°46.685´E; 66 m a.s.l.; 10 Oct. 2014; P. Gerbeaux, P. Keith and G. Marquet leg.; MNHN-IU-2014-20869 GoogleMaps   1 ♀, cl 5.1 mm; same collection data as for preceding; MNHN-IU-2014-20870 GoogleMaps   1 ♂, juvenile, cl 2.2 mm; Pisuku River , downstream; 06°58.848´S, 156°46.582´E; 12 Oct. 2014; P. Gerbeaux, P. Keith and G. Marquet leg.; MNHN-IU-2014-20871 GoogleMaps   .

Other material

AUSTRALIA – Queensland • 1 ♂, cl 4.4 mm; Christian Creek ; 17°20.100´S, 145°55.400´E; 34 m a.s.l.; 6 Jun. 2016; B. Mos leg.; MNHN-IU-2014-20873 GoogleMaps   1 ♀ ovig., cl 6.7 mm; same collection data as for preceding; DNA voucher: CA1685; MNHN-IU-2014-20874 GoogleMaps   1 ♂, cl 4.6 mm; Gordons Creek ; 16°57.967´S, 145° 43.833´E; 39 m a.s.l.; 3 Jun. 2016; B. Mos leg.; DNA voucher: CA1699; MNHN- IU-2014-20875 GoogleMaps   .

INDONESIA • tissue only; West Papua, Kayumera ; 03°53.286´S, 134°28.658´E; 22 Oct. 2010; P. Keith leg.; MNHN-IU-2014-20872 GoogleMaps   .

Comparative material

Caridina variabilirostris (de Mazancourt, Marquet & Keith, 2018)  

See de Mazancourt et al. (2018a).

Caridina brachydactyla (De Man, 1908)  

INDONESIA • lectotype (designated by Richard & Clark 2010), ♀ ovig., cl 4.8 mm; Flores Island, river near Reo ; Nov. 1888; M. Weber leg.; RMNH Crust D. 977   2 paralectotypes, ♀♀ ovig., cl 5.3–5.4 mm; Flores Island, river in Mbawa ; Jan. 1889; M. Weber leg.; RMNH 2552 View Materials   1 ♀, cl 5.8 mm; Bali Island ; NMB 1054 View Materials a   2 ♂♂, cl 2.7–3.7 mm, 1 ♀ ovig., cl 4.3 mm, 1 ♀, cl 4.8 mm; Sulawesi, Palopo, Macaui (locality code: 63.10); W. Klotz leg.; ZMB   1 ♀ ovig., cl 4.0 mm; Sulawesi, Palopo, Tojo (locality code: 64.10); W. Klotz leg.; ZMB   .

Caridina elongapoda ( Liang & Yan, 1977)  

CHINA • 3 ♂♂, cl 2.8–3.5 mm, 1 ♀, cl 4.2 mm; Hong Kong, Pak Tam Chung and Kai Sai Chau (locality codes 14.11 and 22.09); W. Klotz leg.; ZMB.  

MALAYSIA • 1 ♂, cl 4.2 mm, 1 ♀, cl 4.3 mm, 1 ♀ ovig., cl 4.3 mm; Pulau Tioman , Sungai Asah; 24 Jun. 1997; Ng et al. leg.; ZRC 1998.0865 View Materials   .

Caridina peninsularis ( Kemp, 1918)  

MALAYSIA • lectotype (designated by Cai et al. 2007), ♂, cl 3.2 mm; Penang Island, Botanical Garden ; Feb. 1916; N.Anandale leg.; MNHN-IU-2015-1749   1 paralectotype, ♀ ovig., cl 5.4 mm; same collection data as for lectotype; MNHN-IU-2015-1750   1 paralectotype, ♀, cl 3.4 mm, 1 paralectotype, ♀ ovig., cl 5.2 mm, 1 paralectotype, ♂, cl 3.9 mm; same collection data as for lectotype; NHM 1919.11.1.12-21 (1761124)   .

SINGAPORE • 1 ♀ ovig., cl 5.1 mm, 1 ♂, cl 4.2 mm; Tanglin [incorrectly spelt Tangtum in NHM register and on label, see Richard & Clark 2014]; 1958; Bedford and Lanchester leg.; NHM 1958.8.7.14–17 (1749569)   .

Caridina variabilis ( de Mazancourt, Rogers & Keith, 2018)  

See de Mazancourt et al. (2018b).

Caridina sundanella ( Holthuis, 1978)  

INDONESIA • 1 syntype, ♂, cl 3.6 mm, 1 syntype, ♀, cl 5.2 mm; Sumba Island , West Sumba , 4 km N of Waimangura, Waikamburu Brook, Station 450; 250 m a.s.l.; 19 Aug. 1949; E. Sutter and A. B̹hler leg.; NMB 989 View Materials a   .

Description

CEPHALOTHORAX. Carapace ( Fig. 9m View Fig ) smooth, glabrous, with sharp antennal spine placed at lower orbital angle. Pterygostomial margin rounded. Antennular peduncle 0.64 (♀) – 0.80 (♂) times as long as carapace. Long rostrum ( Fig. 9 View Fig m–o), 0.8–1.1 of cl, 17–28 dorsal teeth closely set, leaving 0.20–0.80 of length unarmed distally, 1–3 post-orbital teeth present. 6–18 teeth present of ventral margin extending from proximal end either to tip or with short distal part unarmed. Number of dorsal teeth on rostrum behind first ventral tooth 11–21.

PEREIOPODS. Slender P1 ( Fig. 9a View Fig ): chela about 1.7–2.2 times as long as wide, dactylus 2.6–3.9 times as long as wide, 1.1–1.7 length of palm; carpus 1.4–2.6 times as long as wide with shallow excavation on anterior margin. P2 ( Fig. 9b View Fig ) more slender and longer than first pereiopod: chela 2.2–2.6 times as long as wide, dactylus 3.9–5.2 times as long as wide, 1.2–2.1 times length of palm; carpus 4.8–5.7 times as long as wide. P3 ( Fig. 9c View Fig ): dactylus ( Fig. 9e View Fig ) 3.0–3.4 times as long as wide (terminal spiniform setae included), with 5–7 spiniform setae on flexor margin in addition to terminal one; propodus 10.6–17.9 times as long as wide, 4.1–6.2 times as long as dactylus. P5 ( Fig. 9d View Fig ): dactylus ( Fig. 9f View Fig ) 3.3–5.1 times as long as wide, with 22–46 spiniform setae on flexor margin; propodus 18.3–26.2 times as long as wide, 4.9–7.6 times as long as dactylus.

ABDOMEN. Typical dorsal hump over third abdominal somite. Sixth abdominal somite 0.64 as long as carapace, 1.6 times as long as fifth somite, slightly shorter than telson.

TELSON ( Fig. 9i View Fig ). 3.5 times as long as wide, four pairs of dorsal spinules and one pair of dorsolateral spinules; posterior margin with median process, distal setae short, lateral pair slightly longer than intermediate setae (4–5).

MALE PLEOPODS. Pl1 ( Fig. 9j View Fig ): endopod subtriangular, 2.1 times as long as wide, 0.19 times as long as exopod, with appendix interna placed at distal end. Pl2 ( Fig. 9k View Fig ): appendix masculina reaching 0.60 times length of endopod; appendix interna reaching 0.66 of appendix masculina.

PRE- ANAL CARINA ( Fig. 9g View Fig ). With spine.

UROPODAL DIAERESIS ( Fig. 9h View Fig ). With 10–16 spinules.

EGGS ( Fig. 9l View Fig ). Size: 0.36–0.47 × 0.28–0.29mm.

Habitat

This species prefers fresh and well-oxygenated waters. It is found only in the lower course of rivers.

Colour pattern

Unknown.

Distribution

This species was found on Choiseul Island ( Solomon Islands), Indonesia (West Papua) and Australia (Queensland).

Remarks

Caridina pisuku   sp. nov. looks like C. variabilis   and C. variabilirostris   from Micronesia by the number of teeth and their placement on the rostrum, the proportions between the joints of pereiopods and egg size. However, it can be distinguished by the presence of a spine on the pre-anal carina (vs the pre-anal carina always unarmed in C. variabilis   and C. variabilirostris   ).

Caridina pisuku   sp. nov. is most similar to C. brachydactyla De Man, 1908   , C. elongapoda Liang & Yan, 1977   , C. mertoni Roux, 1911   , C. peninsularis Kemp, 1918   and C. sundanella Holthuis, 1978   . In contrast to C. elongapoda   , C. mertoni   and C. sundanella   , our new species has a spine on the pre-anal carina, like in C. brachydactyla   and C. peninsularis   , but its P2 chela is stouter 2.2–2.6 times as long as wide (vs 2.7–3.2 and 2.8–3.0, respectively).

Caridina pisuku   sp. nov. looks like C. choiseul   sp. nov. by the number of teeth and their placement on the rostrum, the proportions between the joints of pereiopods, and the size of the eggs. However, the pre-anal carina always has a spine (vs the pre-anal with a spine or not in C. choiseul   sp. nov.) and the pterygostomial margin is rounded (vs subrectangular).

RMNH

National Museum of Natural History, Naturalis

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Atyidae

Genus

Caridina

Loc

Caridina pisuku

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

Caridina

de Mazancourt V. & Klotz W. & Marquet G. & Mos B. & Rogers D. C. & Keith P. 2019: 166
2019
Loc

C. longirostris

Page T. J. & von Rintelen K. & Hughes J. M. 2007: 647
2007