Caridina similis Bouvier, 1904

Mazancourt, Valentin De, Mennesson, Marion, Marquet, Gérard & Keith, Philippe, 2025, Revision of the species of Caridina (Decapoda: Atyidae) from the Western Indian Ocean islands with description of a new species, European Journal of Taxonomy 1007, pp. 57-86 : 65-66

Caridina similis Bouvier, 1904

Figs 2C , 5E

Caridina similis Bouvier, 1904: 135 .

Caridina brevirostris f. typica Bouvier, 1912b: 916.

Caridina brevirostris f. Gardineri Bouvier, 1912b: 916 .

Caridina similis – Bouvier 1905: 88, fig. 10. – Keith et al. 2006: 58. – Marquet & Keith 2008: 980, figs 1–3.

Caridina brevirostris f. similis – Bouvier 1925: 228, figs 507–508.

Caridina brevirostris f. typica – Bouvier 1925: 228, figs 509–510, 514–523.

Caridina brevirostris f. Gardineri – Bouvier 1925: 228, figs 505–506, 511–513.

Caridina brevirostris – Bouvier 1904: 136; 1912b: 915; 1913a: 447, pls. 27–29. — Costa 1980: 673‒700.

Caridina singhalensis – Borradaile 1907: 67.

Type locality

Mahé, Seychelles.

Material examined

SEYCHELLES ‒ Mahé • 8 ♀♀ ovig. (cl 4.7‒6.3 mm), 1 ♀ (cl 5.9 mm), 1 ♂ (cl 4.1 mm); mare aux cochons; 4°39.029′ S, 55°24.152′ E; 17 Feb. 2020; P. Keith and M. Mennesson leg.; MNHN-2025-128; MNHN • 3 juv. (cl 2.4‒2.9 mm); Baume Ellie ; 14 Feb. 2020; P. Keith and M. Mennesson leg.; MNHN-2025-129; MNHN . ‒ Silhouette • 1 ♀ ovig. (cl 4.4 mm); Anse Mandon ; 4°28′1″ S, 55°13′30″ E; 28 Nov. 2012; P. Keith leg.; DNA voucher: CA1854 ; MNHN-2025-130; MNHN • 1 ♂ (cl 3.9 mm); same data as for preceding; DNA voucher: CA1855 ; MNHN-2025-131; MNHN • 1 ♀ ovig. (cl 5.5 mm); same data as for preceding; DNA voucher: CA1856 ; MNHN-2025-132; MNHN • 1 ♀ ovig. (cl 5.6 mm); same data as for preceding; DNA voucher: CA1857 ; MNHN-2025-133; MNHN .

See also “other material” in Marquet & Keith (2008).

Distribution

Endemic to the Seychelles (La Digue, Mahé, Praslin, Silhouette).

Habitat

Freshwater in permanent rivers.

Remarks

As for the previous species, C. similis shows a very variable form of the rostrum indicating numerous forms like Caridina brevirostris f. similis , Caridina brevirostris f. typica, Caridina brevirostris f. Gardineri now all junior synonyms of C. similis (see Marquet & Keith 2008).

Figures

Fig. 2. Bayesian inference phylogenetic tree obtained from the 16S marker. Numbers above branches represent Bayesian posterior probabilities, numbers under branches are Maximum Likelihood bootstraps. Letters indicate clades recognized as valid species and colored boxes are species complexes.

Fig. 5. Live coloration of the species of Atyidae from the South West Indian Ocean. A. Atyoida serrata Bate, 1888 from La Réunion (credit E. Vigneux). B. Caridina natalensis De Man, 1908 from the Seychelles (credit P. Keith). C. Caridina spathulirostris Richters, 1880 from Mauritius (credit Hoareau). D. Caridina henriettae sp. nov. from the Seychelles (credit P. Keith). E. Caridina similis Bouvier, 1904 from the Seychelles (credit Y. Zitte). F. C. typus H. Milne Edwards, 1837 from La Réunion (credit E. Vigneux). G–H. C. henriettae sp. nov. from La Réunion (credit E. Vigneux).