Table 3 in Phylogenetic relationships of xenodermid snakes (Squamata: Serpentes: Xenodermidae), with the description of a new genus

Table 3. Parameter values for fossil calibrations used in the BEAST divergence dating analysis. Ages in Ma. All maximum ages soft, except hard maximum for calibration 6.
CalibrationNode calibrationsOffsetMaximum ageMeanStandard deviation1Oldest divergence within crown Alethinophidia93.9100.51.51.252Oldest divergence between non-xenodermid colubroids and their closest living relative (Xenodermidae)50.572.16.11.253Divergence between Boinae and its sister taxon (Erycinae + Candoiinae)58641.81.254Divergence between Corallus and (Chilabothrus + (Epicrates + Eunectes ))50.26441.255Divergence between Viperinae and Crotalinae2023.811.256Divergence between Acrochordus javanicus and (A. ararfurae + A. granulatus)18.123.11.51.257Oldest divergence between Naja (Afronaja) and Naja (Boulengerina)172011.25