| complex longitudinal diversification across south china and vietnam in stejneger's pit viper, viridovipera stejnegeri (schmidt, 1925) (reptilia: serpentes: viperidae). | viridovipera stejnegeri is one of the most common pit vipers in asia, with a wide distribution in southern china and vietnam. we investigated historical demography and explored how the environment and climatic factors have shaped genetic diversity and the evolutionary history of this venomous snake. a total of 171 samples from 47 localities were sequenced and analysed for two mitochondrial gene fragments and three nuclear genes. gene trees reveal the existence of two well-supported clades (south ... | 2016 | 27094901 |