Bayesian estimation of divergence times among lineages of <i>Acanthoscelides obtectus</i> based on cytochrome c oxidase subunit I (COI). Posterior means and the associated 95% highest probability density (in parentheses) for the age of the most recent common ancestor (tMRCA) are given in years. Cal

Bayesian estimation of divergence times among lineages of Acanthoscelides obtectus based on cytochrome c oxidase subunit I (COI). Posterior means and the associated 95% highest probability density (in parentheses) for the age of the most recent common ancestor (tMRCA) are given in years. Calibration had the following priors: tMRCA for ‘Brazil+Old World’ (hypothesis 500) was placed at 500 years before the present (BP); tMRCAs of ‘Mesoamerica’ (hypothesis 7000a) and Mitogroup I (hypothesis 7000b) were placed at 7,000 BP; tMRCAs of ‘Andes’ (hypothesis 8000a) and Mitogroup II (hypothesis 8000b) were set to 8,000 BP (see Material and Methods for calibration details).