A new freshwater shrimp species of the genus Caridina (Crustacea, Decapoda, Atyidae) from Quang Ninh province, Northeast Vietnam

A new species of atyid freshwater shrimps from Quang Ninh province, Northeast Vietnam is described. Caridina baitulong sp. nov. can be distinguished from its congeners by a suite of morphological characters such as the rostrum reaching to the middle or end of the second segment of antennular peduncle, stylocerite reaching to the end or sometimes slightly overreaching distal end of basal segment of antennular peduncle, endopod of male first pleopod sub-rectangular, appendix interna of male second pleopod extending about 0.7 times length of appendix masculina.

Molecular phylogenetic analysis of the mitochondrial cytochrome oxidae subunit (COI) and 16 S ribosomal RNA (16 S) genes also clearly support the distinctiveness of the new species from all other examined species, while also suggesting high intra-specific divergence.