The Paramesotriton caudopunctatus species group is mainly distributed in the karst mountain ecosystems of Guizhou, China. Although some species have been included in previous phylogenetic studies, the evolutionary relationships and divergence-time of members of this species group as a whole remain unexplored. In this study, we report the sequencing of one protein coding mitochondrial gene fragment（ND2） and one nuclear gene（POMC）, and use a combination of phylogenetic analyses and coalescent simulations to explore the cryptic diversity and e...
