The Chinese-Myanmar border area forms part of a long-acknowledged biodiversity hotspot. This region is characterised by dramatic topography and diverse landscapes, which support a high degree of biodiversity and endemism that remains largely understudied. Based on recent survey efforts we here describe a new frog species of the genus Odorrana from this area. Found in Dulongjiang village, Yunnan, China, the new species differs from a morphological perspective from its congeners through the combination of a grass-green dorsum with black posterior spots, absence of dorsolateral folds, a distinct pineal body, presence of supratympanic folds, absence of outer metacarpal, metatarsal and supernumerary tubercles, and a pair of external subgular vocal sacs. From a molecular perspective, pairwise genetic distances of 4.8% to 11.6% for DNA sequences of the mitochondrial gene for 16S ribosomal RNA differentiate the new species from other Odorrana. Our mitochondrial phylogeny suggests that the new species is a deeply divergent genetic lineage clustering with the clade including Odorrana wuchuanensis, and the Odorrana andersonii and Odorrana margaretae groups. The discovery of this new species emphasizes the need for further herpetological studies in the China-Myanmar border region.

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