Background: Estimating divergence times in phylogenies using a molecular clock depends on accurate modeling of nucleotide substitution rates in DNA sequences. Rate heterogeneity among lineages is like
Node age estimates from Beast analyses are shown; estimates based on island calibrations are presented in columns 2 and 3, estimates based on a divergence rates are presented in columns 4 and 5. Ances
Molecular sequence data provide information about relative times only, and fossil-based age constraints are the ultimate source of information about absolute times in molecular clock dating analyses.
Node ages (Ma) and 95% highest probability density (HPD) and credibility (CI) intervals estimated under rate variation and autocorrelation relaxed molecular clocks with BEAST and Multidivtime programs
