  This paper provides an overview and a tutorial of molecular clock dating
using MrBayes, which is a software for Bayesian inference of phylogeny. Two
modern approaches, total-evidence dating and node dating, are demonstrated
using a dataset of Hymenoptera with molecular sequences and morphological
characters. The similarity and difference of the two methods are compared and
discussed. Besides, a non-clock analysis is performed on the same dataset to
compare with the molecular clock dating analyses.
