Revalidation of Caridina natalensis De Man, 1908 (Crustacea: Decapoda: Atyidae) in the South Western Indian Ocean
Author
Mazancourt, Valentin De
Author
Castelin, Magalie
Author
Renneville, Clementine
Author
Mlambo, Musa C.
Author
Marquet, Gerard
Author
Keith, Philippe
text
Zootaxa
2019
2019-01-08
4543
3
375
387
journal article
27699
10.11646/zootaxa.4543.3.3
83f49512-987b-40e7-8686-f664b4a8c178
1175-5326
2617875
664F8A71-F6D9-40F6-9713-FF72003108A2
Caridina natalensis
De Man, 1908
Caridina nilotica var. natalensis
De Man, 1908
: 262
–263 pl.20, fig.3, 3a, 3b;
Lenz, 1912
: 5
;
Bouvier, 1925
: 154
–155 fig. 320;
Barnard, 1950
: 655
(key).
Caridina
longirostris-
Richters, 1880
:162
–163;
Holthuis, 1965
: 20
–23 fig. 6;
Keith
et al.
2006
: 50
–51.
Caridina nilotica
var. brachydactyla-
Lenz, 1910
: 568
;
Roux, 1929
: 303
–304 tab.1 no.15.
Caridina nilotica
var. gracilipes-
Lenz, 1910
: 568
.
Caridina brachydactyla brachydactyla
-
Costa
1980
: 673
–700.
Material examined. Type material:
Caridina nilotica natalensis
De Man, 1908
:
SOUTH AFRICA
.
Lectotype
(designated by
Richard & Clark, 2010
). ZMA.CRUS.D.
102886
,
1♀
ovig. cl
6.4mm
; Umgeni River, Durban, Natal, coll. M. Weber, 1898, det. J.G. De Man.
Paralectotypes
. ZMA.CRUS.D.
102886
,
2♀
ovig. cl
5.7–6.4mm
; same data.
Caridina nilotica var. brachydactyla
De Man, 1908
:
INDONESIA
.
Lectotype
(designated by
Richard & Clark, 2010
). RMNH.CRUS.D.977,
1♀
ovig. cl
4.8mm
; Near Reo, Flores, coll. M. Weber.
Paralectotypes
.
RMNH
.
CRUS
.D.2552,
2♀
ovig. cl
5.3–5.4mm
; river near Palopo Luwu,
Sulawesi
, coll.
M. Weber
..
Caridina brevidactyla
Roux, 1920
:
INDONESIA
.
Lectotype
(designated by
Richard & Clark, 2010
).
NMB
4
.
VI.
b 1,
1♂
cl 4,8mm;
Sungi Manumbai
,
Wokam Island
,
Aru
,
April 14
–
15,1908.
Paralectotypes
.
NMB
4
.
VI.
a,
1♂
cl
3.3mm
;
Aru
,
Udjir Island
,
April 15, 1908
,
NMB
4
.
VI.
b,
2♀
cl
5.8–6.4mm
;
Sungi Manumbai
,
Wokam Island
,
Aru
,
April 14
–15,1908.
NMB
0 0 0 0 4 VIc,
Wokamar
,
Wokam Island
,
Aru
,
April 17, 1908
,
1♀
ovig. 5,7mm;
NMB
4
.
VI.
d;
2♀
ovig. cl
5.7mm
,
Seltutti
,
Kobroor Island
,
Aru
,
May 2, 1908
.
Caridina gracilipes
De Man, 1892
:
INDONESIA
.
Paralectotypes
. ZMA.CRUS.D.
102635
,
1♂
cl
4.1mm
(DNA: CA025),
1♀
ovig. cl
5.9mm
(DNA: CA023),
3♀
cl
5.1mm
(DNA: CA027),
5.2mm
(DNA:CA024) and
5.6mm
; in a rice field, Makassar,
Sulawesi
, coll. M. Weber, 1888. NMB 1061e,
1♂
3.8mm
;
2♀
cl
5.8–5.9mm
; same data.
Caridina longirostris
H. Milne Edwards, 1837
:
ALGERIA
.
Paralectotypes
. MNHN-IU-2013-19419,
3♂
cl
2.9–3.1mm
; from the river Macta, near
Oran
. MNHN IU-2013-19418,
2♂
3.2–3.6mm
; same data.
Non-
types
:
Caridina natalensis
KENYA
.
MNHN-IU-2015-1854, Tiwi river,
20km
south of
Mombasa
.
TANZANIA
. NHM 1982.576,
3♀
ovig. cl
5.5–7.2mm
,
Ruo Lukuledi
,
Tanganyika.
SOUTH AFRICA
.
MNHN-
IU-
2018-61
,
1
♂ cl
3.3mm
(DNA:
CA2079
) and MNHN-IU-
2018-62
,
1♀
ovig. cl 6.0mm,
River Mbanyana
,
32°13.123'S
28°55.031'E
, altitude
9m
, coll.
Maliwa L.
,
Mlambo M
.,
Marquet G
. &
Tiberghien, P
.,
February 11, 2018
; MNHN-IU-
2018-63
,
1♀
ovig. cl
6.9mm
and MNHN-IU-
2018-64
,
1♀
ovig. cl
6.8mm
,
River Umtata
, altitude
2m
,
31°34.144'S
,
28°45.523'E
, coll.
Maliwa L.
,
Mlambo M
.,
Marquet G
. &
Tiberghien, P
.,
February 13, 2018
; MNHN-IU-
2018-65
,
1♀
ovig. cl
6.3mm
and MNHN-IU-
2018-66
,
1♀
ovig. cl
6.3mm
(DNA:
CA2083
),
River Mzumbe
, altitude
6m
,
30°36.151'S
30°32.817'E
, coll.
Maliwa L.
,
Mlambo M
.,
Marquet G
. &
Tiberghien, P
.,
February 16, 2018
; MNHN-IU-
2018-67
,
1♀
ovig. cl
6.8mm
and MNHN-IU-
2018-68
,
1♀
ovig. cl 7.0mm,
River
iLovu, altitude
8m
,
17°05.858'S
30°49.390'E
, coll.
Maliwa L.
,
Mlambo M
.,
Marquet G
. &
Tiberghien, P
.,
February 17, 2018
.
MAYOTTE
. MNHN-IU-
2018-69
,
1♀
ovig cl
6.1mm
,
River Bouyoni
, altitude
14m
,
12°43.966'S
45°8.250'E
, coll.
ARDA
,
May 15, 2006
; MNHN-IU-
2018-70
,
1♀
cl
4.5mm
and MNHN-IU-
2018-71
,
1♀
cl 6.0mm,
River Dembeni
, altitude
19m
,
12°50.402'S
45°10.461'E
, coll.
ARDA
,
November 12, 2003
; MNHN-IU-
2018-72
,
River Kwalé
, altitude
39m
, 12°48'092'S
45°11.520'E
, coll.
ARDA
,
November 10, 2003
; MNHN-IU-
2018-73
,
1♀
cl
4.6mm
, MNHN-IU-
2018-74
, MNHN-IU-
2018-76
and MNHN-IU-
2018-75
,
1♀
cl
5.2mm
,
River Soulou
, altitude
14m
,
12°45.812'S
45°5.951'E
, coll.
ARDA
,
November 9, 2003
.
COMOROS
.
MNHN-IU-
2018- 77
,
1♀
ovig. cl
3.8mm
(DNA:
CA1344
),
River Bwanifunge
,
Moheli Island
, altitude
39m
,
12°19.642'S
,
43°40.240'E
, coll.
A. Abdou
December 30, 2013
; MNHN-IU-
2018-78
,
1♀
ovig. cl
4.5mm
(DNA:
CA1343
),
River Mdjawashe
,
Moheli Island
altitude
18m
,
12°21.386'S
,
43°41.944'E
, coll.
A. Abdou
,
December 31, 2013
.
MADAGASCAR
. MNHN-IU-
2018-79
,
1♀
ovig. cl
4.1mm
(DNA:
CA1035
), MNHN-IU-
2018-80
,
1♀
ovig.
4.8mm
(DNA:
CA1037
), MNHN-IU-
2018-81
,
1♀
cl
4.3mm
and MNHN-IU-
2018-82
,
1♂
cl
4.8mm
,
River Ambodiforaha
, altitude
9m
,
15°43.054'S
49°57.637'E
, coll.
R. Fara
, H.
Grondin, G. Marquet, T.
Robinet,
May 15, 2010
; MNHN-IU-
2018-87
,
1♀
ovig cl
3.5mm
, MNHN-IU-
2018-83
,
1♀
ovig cl
5.2mm
, MNHN-IU-
2018-88
1♀
cl 4.0mm, MNHN-IU-
2018-85
,
1♀
cl 4.0mm, MNHN-IU-
2018-86
,
1♀
cl
4.3mm
and MNHN-IU-
2018-84
,
1♂
cl 4.0mm,
River Andempona
,
Ampanasanovy
estuary, altitude 0m,
14°35.298'S
50°10.105'E
, coll.
C. Ellien
, R.
Fara, E. Feunteun, N. Mary, T.
Robinet, July 0 4, 2008; MNHN-IU-
2018-89
,
1♀
ovig. cl
4.7mm
, MNHN-IU-
2018-90
,
1♀
cl
4.7mm
, MNHN-IU-
2018-92
,
1♀
cl
4.9mm
, MNHN-IU-
2018-91
,
1♀
cl
5.5mm
, MNHN-IU-
2018-93
,
1♂
cl
3.8mm
and MNHN-IU-
2018-94
,
1♂
cl 4.0mm,
River Ankavia
, altitude
23m
,
14°59.488'S
50°11.095'E
, coll.
C. Ellien
, R.
Fara, E. Feunteun, N. Mary, T.
Robinet, July 0 3, 2008; MNHN-IU-
2018-95
,
1♀
ovig. cl 4.0mm,
MNHN-
IU-
2018-96
,
1
♀ cl
4.8mm
, MNHN-IU-
2018-97
,
1♀
cl
5.5mm
and MNHN-IU-
2018-98
,
1♂
cl 3.0mm,
River Fanambana
, altitude
11m
,
14°33.517'S
50°10.017'E
, coll.
C. Ellien
, R.
Fara, E. Feunteun, N. Mary, T.
Robinet,
July 4, 2008
; MNHN-IU-
2018-99
,
1♀
ovig cl
3.9mm
(DNA:
CA1184
) and MNHN-IU-2018-100
,
1♀
cl
4.8mm
(DNA:
CA1185
), unknown locality, coll.
C. Ellien
, R.
Fara, E. Feunteun, N. Mary, T
.
Robinet
.
SEYCHELLES
ISLANDS
. MNHN-IU-2017-1445
,
1♀
ovig. cl
4.8mm
(DNA:
CA1195
) and MNHN-IU-2017-1446
,
1♀
cl
4.8mm
(DNA:
CA1194
), unknown river,
Mahé Island
, coll.
ARDA
,
November 24, 2004
; MNHN-IU-2017-1447,
1♀
ovig. cl
4.5mm
(DNA:
CA1186
) and MNHN-IU-2017-1448
,
1♂
cl
4mm
(DNA:
CA1187
),
River Nouvelle Découverte
,
Praslin Island
, altitude
8m
,
4°19.304'S
55°42.351'E
, coll.
ARDA
,
October
0 8, 2003.; MNHN-IU-2017-1449
,
1♀
ovig. cl
4.9mm
(DNA:
CA1197
) and MNHN-IU-2017-1450
,
1♂
cl
4.1mm
(DNA:
CA1196
),
River Grande Barbe
,
Silhouette Island
,
4°30.052'S
55°13.537'E
, coll.
ARDA
,
November 20, 2004
.
MAURITIUS
.
MNHN-IU-2017- 1451,
1♀
ovig. cl
4.2mm
, MNHN-IU-2017-1452,
1 juvenile
cl
2.3mm
, MNHN-IU-2017-1454,
1 juvenile
cl
2.4mm
and MNHN-IU-2017-1453,
1 juvenile
cl
2.6mm
;
Forested lake
, saline, near
Camp Poorun
, altitude
11m
,
20°10.517'S
57°45.767'E
, coll.
C. R. Turner
,
December 11, 2005
.
FIGURE 2.
Caridina natalensis
; a. first pereiopod; b. second pereiopod; c. third pereiopod; d. fifth pereiopod; e. dactylus of fifth pereiopod; f. dactylus of third pereiopod; g. uropodal diaeresis; h. pre-anal carina; i. telson; j. eggs; k. second male pleopod; l. first male pleopod; m. anterior region of cephalothorax: n, o. rostrum variations.
FIGURE 3.
a, b, c, d: Views of living specimens of
Caridina natalensis
showing their coloration; a. Specimen from Madagascar (G. Marquet); b. Specimen from Seychelles (P. Keith); c, d. Specimen from South Africa (G. Marquet). e: Example of habitat where
C. natalensis
lives; Iharaka river, Madagascar (G. Marquet).
FIGURE 4.
Distribution of
Caridina natalensis
with sampling localities of the specimens of this species examined for the study (black circles) and its type locality (white star).
Diagnosis.
Carapace (
Fig.
2m
, n, o
) smooth, glabrous, with sharp antennal spine placed at lower orbital angle. Pterygostomian margin rounded. Rostrum rather constantly long, 0.8–1.3 of cl, straight or curved up distally, reaching well beyond scaphocerite. 15–26 dorsal teeth, leaving distally unarmed part of rostrum 0.4–1.2 times that of armed part, except for one to three subapical tooth, 1 to 2 post-orbital teeth present. 7–23 teeth present on the ventral margin extending from highest part of the rostrum either to tip or with short distal part unarmed. Number of dorsal teeth on the rostrum before the most proximal ventral tooth 10–14. Rostral formula: (1–2) 15–26 + 1–3 / 7– 23.
First pereiopod (
Fig. 2a
): Stout, chela about 1.8–2.4 times as long as wide, dactylus 2.5–6.0 times as long as wide, 0.8–1.6 length of palm; carpus 1.7–3.3 times as long as wide with shallow excavation on anterior margin.
Second pereiopod (
Fig. 2b
): More slender and longer than first pereiopod. Chela 1.9–3.0 times as long as wide, dactylus 3.5–7.0 times as long as wide, 1.1–1.9 times length of palm; carpus 4.3–6.0 times as long as wide.
Third pereiopod (
Fig. 2c
): Dactylus (
Fig. 2d
): 2.9–4.0 times as long as wide (terminal spine included) with 6–9 spineson flexor margin in addition to the terminal one; propodus 12.7–18.6 times as long as wide, 4.1–6.6 times as long as dactylus.
Fifth pereiopod (
Fig. 2e
): Dactylus (
Fig. 2f
): 3.0–6.01 times as long as wide with 31–61 spiniform setae on flexor margin; propodus 15.2–22.0 times as long as wide, 4.3–5.7 as long as dactylus.
First male pleopod (
Fig. 2k
): Endopod leaf-like with a developped appendix interna in males.
Second male pleopod (
Fig. 2l
): Appendix masculina on second pleopod reaching 0.52 times length of endopod; appendix interna reaching about 0.84 times length of appendix masculina.
Egg size (
Fig. 2j
): 0.35–0.46 ×
0.22–0.29 mm
.
Preanal carina (
Fig. 2h
): with a strong spine.
Telson (
Fig.
2i
): ending triangular with a posteromedian projection; 1 pair of longer lateral simple setae and 2 to 3 pairs of shorter intermediate simple setae shorter or slightly longer.
Uropodal diaeresis (
Fig.
2g
): with 9–14 short spinules.
Colour pattern.
Colours (
Fig. 3
) vary and tend to match the substrate the shrimp lives on. The body can vary from hyaline to brownish with red dots, with sometimes a large red border on the ventral side of the rostrum. An oblique brown or carmine red band on the cephalothorax is very characteristic. The coloration is lost on preserved animals.
Habitat.
All specimens were collected in the lower course of rivers, (altitude
5–25 m
), among macrophytes in running water.
Distribution.
C. natalensis
occurs in
Comoros
(
Anjouan
,
Mohéli
),
Mayotte
,
Seychelles
(La Digue,
Mahé
, Praslin and Silhouette),
Mauritius
, in
Madagascar
and
South Africa
. Present before in
Reunion
Island (
Costa 1980
;
Kiener & Duchochois 1981
) this species seems now absent despite extensive propspections made there since (
Fig. 4
).