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
treatment provided by
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.
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
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 .
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 .
See de Mazancourt et al. (2018a).
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 .
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 .
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 19126.96.36.199-21 (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 19188.8.131.52–17 (1749569) .
See de Mazancourt et al. (2018b).
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 .
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.
This species prefers fresh and well-oxygenated waters. It is found only in the lower course of rivers.
This species was found on Choiseul Island ( Solomon Islands), Indonesia (West Papua) and Australia (Queensland).
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).
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.
|Mazancourt, Valentin de, Boseto, David, Marquet, Gerard & Keith, Philippe 2020|
|de Mazancourt V. & Klotz W. & Marquet G. & Mos B. & Rogers D. C. & Keith P. 2019: 166|
|Page T. J. & von Rintelen K. & Hughes J. M. 2007: 647|