Chronogram and phylogeny of the genus Karstsinnectes. Circles at each node indicate Bayesian posterior probabilities (BPP). Colored squares at the tip of Karstsinnectes branches indicate species distributions, and the three major clades are marked using Roman numerals (I–II). Divergence times for major clades are marked in parentheses with 95% confidence intervals. Arrows show dispersal events. Species photos from Zhu (1989).