Molecular phylogeny and taxonomic position of (De Man, 1911), with descriptions of two new species from Thailand (Decapoda, Caridea, Palaemonidae).

(De Man, 1911), a translucent freshwater prawn has a wide distribution range throughout mainland Southeast Asia. A high morphological variation and genetic divergence between different geographical populations in Thailand have peculiarly extended the uncertainty of species boundaries and blended confusingly with several species. To clarify these circumstances, broad sample examinations of the morphological variation, including topotype specimens, and phylogenetic reconstruction based on the concatenated mitochondrial dataset (16s rRNA and COI genes) were performed.