Chronogram of Nesticella spiders. The chronogram was obtained using BEAST. The geologic time scale is indicated in millions of years below the tree. Blue stars mark the two calibration points. Blue node bars indicate the 95% highest posterior density interval for divergence estimates. The red dot corresponds to the root of the plateau Nesticella cave spiders. The grey shaded area indicates the time frame when mass cave colonization events happened. Clade A, B and C were labeled beside each clade root.