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Table 1 Median divergence time estimates obtained with various models and a single morphological clock

From: Sphenodontian phylogeny and the impact of model choice in Bayesian morphological clock estimates of divergence times and evolutionary rates

FBD model Sampling strategy Full model Root Sphenodontia Sphenodontinae Eilenodontinae
M Rng HPD M Rng HPD M Rng HPD M Rng HPD
FBD All sampling priors FossilTip+IGR 307.3 71.1 262.8 57.5 191.3 19.8 165.5 36.5
FossilTip+TK02 293.6 69.8 262.7 60.9 189.6 17.1 168.3 40.9
Random+IGR 330.8 94.3 290.4 80.8 191.2 21.9 165.5 38.1
Random+TK02 335.2 91.2 293.1 78.3 188.9 16.4 161.1 30.4
Diversity+IGR 326.4 89.7 286.8 78.1 191 21.2 165.2 37.4
Diversity+TK02 329.7 87.8 289.5 75.6 189 16.7 161.3 30.2
NoSA_Diversity+IGR 303.8 67.6 260.2 55 191.1 18.9 165.1 35.5
NoSA_Diversity+TK02 289.4 62.1 259.5 56.3 189.4 16.4 167.9 40
SFBD NoSA diversity SFBD(s)2l+IGR 297.4 60.8 255.3 50.0 190.8 18.0 165.0 34.4
SFBD(s)3l+IGR 298.7 63.3 256.3 51.2 190.8 18.3 165.0 34.5
SFBD (sdr)2l+IGR 305.3 77.9 261.7 63.2 191.5 20.6 167.4 40.6
SFBD(s)2l+TK02* 279.7 51.1 251.3 48.6 189.0 15.1 168.7 39.4
SFBD(s)3l+TK02 281.5 53.3 252.8 50.0 189.0 15.3 168.6 39.3
SFBD (sdr)2l+TK02 282.1 60.9 253.5 56.3 189.2 16.4 170.6 41.9
  1. Results obtained under the FBD (top) and the skyline FBD (SFBD) tree model (bottom) with distinct taxon sampling strategies and relaxed clock models. The SFBD analyses are focused on the optimal sampling strategy (NoSA diversity). Median values are reported given the very broad and skewed 95% HPD distributions. Values in bold highlight divergence times in stronger agreement with the fossil record (e.g., within the Permian for the root age), which also have narrower 95% HPD ranges. Abbreviations: M median value for node age, Rng HPD range between lower and upper bound values for the 95% HPD. *Model combination with the most precise (smallest 95% HPD range) and conservative (greatest agreement with the fossil record) root age estimate under a single morphological partition