Caridina cf. serratirostris, De Man, 1892

Mazancourt, Valentin de, Marquet, Gérard & Keith, Philippe, 2024, An Integrative Taxonomic Revision of the Freshwater Atyid Shrimps (Crustacea: Decapoda: Caridea) of Micronesia, Diversity 16 (200), pp. 1-31 : 18-19

Caridina cf. serratirostris

Figures 3Hand 7 .

Material examined

FEDERATED STATES OF MICRONESIA: Pohnpei Island . MNHN-IU-2024-461 (DNA: CA1245 ): 1 ♀ ovig. cl 2.5 mm, Nanpilriver ( station 3 ), 9 March 2012, 52 ma.s.l., 06 ◦ 55.111 ′ N, 158 ◦ 12.878 ′ E, coll. M. Castelin, P. Keith, P. Gerbeaux, G. Marquet, and L. Taillebois.

Distribution

Reported only from Pohnpei Island.

Remarks

This species is distinct from all the others known in this group based on molecular data (minimum 16S p-distance: 14%), but the only specimen available is too damaged to provide a sufficient morphological description. Rostral formula: 19 (10)/3, rostrum 0.38 times as long as carapace length, egg size 0.40–0.43 mm × 0.23–0.26 mm ( Figure 7 ).

Figures

Figure 3. Phylogenetic tree of the atyid species from Micronesia obtained by Bayesian inference from the 16S rRNA. Numbers above branches indicate Bayesian posterior probabilities, numbers under branches indicate maximum likelihood bootstraps. Letters A–K for the clades refer to the species listed in the taxonomic account.

Figure 7. Caridina cf. serratirostris. Lateral view of the single ovigerous female, MNHN-IU-2024-461 (DNA: CA1245).