Caridina marquesensis, Mazancourt & Marquet & Keith, 2019

Mazancourt, Valentin de, Marquet, Gérard & Keith, Philippe, 2019, Revision of freshwater shrimps belonging to Caridina weberi complex (Crustacea: Decapoda: Atyidae) from Polynesia with discussion on their biogeography, Journal of Natural History 53 (13), pp. 815-847 : 825-828

publication ID

https://doi.org/ 10.1080/00222933.2019.1612959

publication LSID

lsid:zoobank.org:pub:17B62044-4D99-48EE-A665-3E5E7F1A864B

DOI

https://doi.org/10.5281/zenodo.3680510

persistent identifier

https://treatment.plazi.org/id/03C2B155-E54A-FFBF-889D-FE63FD77FC37

treatment provided by

Valdenar

scientific name

Caridina marquesensis
status

n. sp.

Caridina marquesensis n. sp.

www.zoobank.org/ urn:lsid:zoobank.org:act:F518C8E2-A785-42B7-A455-0CE2CA2CE508 ( Figure 4 View Figure 4 )

Caridina weberi – Edmondson 1935: 10 , Figure 4 View Figure 4 (h); Adamson 1935: 16, 1939: 36; Marquet 1988 (partim); Marquet 1991: 129 – 130 (partim); Poupin 1998: 9 (partim); Keith and Vigneux 2002: 126 (partim), photo 7 & 8; Keith et al. 2002: 44 – 45 (partim); Keith et al. 2013: 84 – 85 (partim).

Material examined

Type material. Holotype: 1 ♂, cl 2.9 mm, 9 October 2017, 09°49.750 ′ S 135°04.418 ′ W, Ta ’ ooa river, Hiva Oa Island, French Polynesia, altitude 220m, G. Marquet, P. Tiberghien, E. Feunteun, P. Gerbeaux & M. Gerbeaux coll., MNHN-IU- 2017-66. GoogleMaps

Paratypes: 1 ♀ ovig, cl 3.3 mm, same data as holotype, MNHN-IU- 2017-67 (DNA: CA2067 ); GoogleMaps 1 ♀, cl 2.8 mm, same data as holotype, MNHN-IU- 2017-68 (DNA: CA2066 ); GoogleMaps 1 ♀ ovig, cl 4.7 mm, 18 October 2017, 08°51.126 ′ S 140°06.066 ′ W, Taipivai river , Nuku Hiva Island, French Polynesia, altitude 130m, G. Marquet, P. Tiberghien, P. Keith & H. Lucien- Brun coll., MNHN-IU- 2017-69 (DNA: CA2075 ); GoogleMaps 1 ♀ ovig, cl 4.8mm, same data as previous, MNHN-IU- 2017-70 (DNA: CA2074 ); GoogleMaps 1 ♀, cl 3.2 mm, 14 October 2017, 09°25.452 ′ S 140° 03.409 ′ W, unnamed rivulet, Ua Pou Island , French Polynesia, altitude 130m, G. Marquet, P. Tiberghien, P. Keith & H. Lucien-Brun coll., MNHN-IU- 2017-71 (DNA: CA2071 ); GoogleMaps 1 ♀, cl 3.4 mm, same data as previous, MNHN-IU-2018-257 (DNA: CA2070 ); GoogleMaps 1 ♀ ovig, cl 5.2 mm, 21 February 2000, 09°24.180 ′ S 140°03.060 ′ W, Paaumea river , Ua Pou Island, French Polynesia, altitude 200m, P. Keith & E. Vigneux coll., MNHN-IU-2018-258; GoogleMaps 1 ♀, cl 4.6 mm, same data as previous, MNHN-IU-2018-259 GoogleMaps .

Comparative material. Type material

Caridina weberi De Man, 1892 .

Syntypes: 2 ♂, cl 4.4 – 4.5 mm and 1 ♀ ovig, cl 6.1 mm, Kotting , Flores Island, Indonesia, M. Weber coll., MNHN-IU-2015 – 1755.

Description

Cephalothorax. Rostrum ( Figure 4 View Figure 4 (h)): always bent down, short, 0.3 – 0.4 of cl, reaching to base or middle of second segment of antennular peduncle, armed dorsally with 10 – 13 teeth, 0 – 3 teeth on carapace posterior to orbital margin (mostly 2 – 3), ventral margin with 0 – 3 teeth. Rostral formula (0 – 3) 10 – 13/0 – 3. Suborbital angle indistinguishably fused with antennular tooth. Pterygostomian margin rectangularly rounded.

Eyes well developed, anterior end reaching to 0.62 length of antennular peduncle basal segment. Antennular peduncle 0.50 times as long as carapace. Anterolateral angle reaching 0.20 length of second segment, second segment subequal to third. Stylocerite reaching to 0.9 length of antennular peduncle basal segment. Scaphocerite reaches just slightly beyond tip of antennular peduncle, about 2.1 times longer than wide.

Mouthparts. Left mandible, right mandible, first maxilla, second maxilla, first maxilliped, second maxilliped and third maxilliped typical of genus.

Pereiopods. Epipods on first four pereiopods.

Pereiopod 1 ( Figure 4 View Figure 4 (a)): chela about 2.0 – 2.2 times as long as wide, movable finger 2.2 – 3.1 times as long as wide, 0.6 – 0.9 times length of palm, carpus 1.3 – 1.7 times as long as wide. Tips of both fingers with prominent claws ( Figure 4 View Figure 4 (b)).

Pereiopod 2 ( Figure 4 View Figure 4 (c)) more slender and long than the first pereiopod with chela 2.5 – 3.3 times as long as wide: movable finger 4.2 – 5.2 times as long as wide, 1.5 – 1.8 times length of palm, carpus slender 5.5 – 6.6 times as long as wide.

Pereiopod 3 ( Figure 4 View Figure 4 (d, g)): stout, dactylus 2.7 – 3.1 times as long as wide including terminal spine) with 6 – 7 spines including terminal spine, propodus with numerous spines on ventral margin, 8.0 – 9.3 times as long as wide, 3.4 – 4.3 times as long as dactylus.

Pereiopod 5 ( Figure 4 View Figure 4 (e, f)): dactylus 3.4 – 5.5 as long as wide, ending in two large claws with 32 – 55 spiniform setae on flexor margin, propodus 13.0 – 17.7 times as long as wide, 3.8 – 5.2 times as long as dactylus.

Abdomen. Third abdominal somite with moderately convex dorsal profile. Sixth abdominal somite about 0.37 of carapace, 0.7 times as long as fifth somite, shorter than telson. Telson ( Figure 4 View Figure 4 (l)) 2.1 times as long as wide, with four to six pairs of dorsal spines and one pair of dorsolateral spines, posterior margin with a median process, rounded with 6 – 14 intermediate plumose setae longer than lateral spines.

First male pleopod ( Figure 4 View Figure 4 (m)): Endopod extending to half length of exopod, elongate, with a developed appendix interna near distal end of endopod.

Second male pleopod ( Figure 4 View Figure 4 (n)): Appendix masculina reaching 0.72 times length of endopod, appendix interna reaching about 0.50 times appendix masculina length.

Preanal carina ( Figure 4 View Figure 4 (i)): High, unarmed.

Uropodal diaeresis ( Figure 4 View Figure 4 (k)): with 16 – 22 spinules.

Eggs ( Figure 4 View Figure 4 (j)): Size 0.39 – 0.47 × 0.23 – 0. 27mm.

Habitat

This new species prefers fresh and well-oxygenated running waters from the lower course to the higher course. In Nuku Hiva (Marquesas islands) C. marquesensis n. sp. lives in lentic habitat of the lower course, associated with accumulations of leaves, where it collects small detritus and eventually is able to swim ( Fossati et al. 2002).

Etymology

This new species is named marquesensis , from the name of the archipelago, Marquesas Islands, where it occurs.

Colour pattern ( Figure 7 View Figure 7 (c))

The live general colour of the body is bluish to greenish and slightly translucent. Numerous red spots are visible all over the body.

Distribution ( Figure 8 View Figure 8 )

This species is known only from Marquesas islands (Nuku Hiva, Hiva Oa, Ua Pou Islands) so far and seems to be endemic.

Remarks

This new species was identified as C. weberi several times: Edmondson 1935, Adamson (1935, 1939), Marquet (1988), Marquet (1991), Poupin (1998), Keith and Vigneux (2002), Keith et al. (2002), Keith et al. (2013). Indeed, this species looks like C. weberi sensu stricto by its straight or bent down rostrum, 0.3 – 0.4 of cl, (vs 0.4 in C. weberi ) reaching to the base or middle of second segment of antennular peduncle with numerous dorsal teeth 10 – 13 (vs 10 – 19 in C. weberi ), but differs by the presence of 0 – 3 dorsal teeth situated on carapace behind orbital margin (vs 0 in C. weberi ). Also its P1 movable finger is shorter 0.6 – 0.9 times length of palm (vs 1.2 – 1.3 in C. weberi ) as is its P1 carpus 1.3 – 1.7 times as long as wide (vs 1.9 – 2.0 in C. weberi ), and its P2 carpus is longer, 5.5 – 6.6 times as long as wide (vs 4.9 – 5.0 in C. weberi ). Furthermore, the posterior margin of the telson always shows only one pair of lateral spines (vs 2 in C. weberi ).

This species differs from C. tupaia n. sp. by its rostrum with mostly 2 – 3 teeth on carapace posterior to orbital margin (vs mostly 0 in C. tupaia n. sp.), its tips of both P1 fingers with prominent claws (vs not in C. tupaia n. sp.) and its P5 dactylus ending in two large claws (vs one claw in C. tupaia n. sp.).

Kingdom

Animalia

Phylum

Arthropoda

Class

Malacostraca

Order

Decapoda

Family

Atyidae

Genus

Caridina

Loc

Caridina marquesensis

Mazancourt, Valentin de, Marquet, Gérard & Keith, Philippe 2019
2019
Loc

Caridina weberi – Edmondson 1935: 10

Keith P & Marquet G & Gerbeaux P & Vigneux E & Lord C 2013: 84
Poupin J 1998: 9
Marquet G 1991: 129
Adamson AM 1939: 36
Edmondson CH 1935: 10
Adamson AM 1935: 16
1935