Figure 1
Age estimates for major animal groups obtained under different molecular clock models. Mean and 95% credibility intervals (CrIs) of age estimates for select nodes obtained with Calibration set A and the 1000 Ma root age prior (see text) under the autocorrelated “ln” (lower bars) and uncorrelated “ugam” (upper bars) relaxed clock models. Taxon names refer to crown groups. “Calc. + Homo.” = Calcarea + Homoscleromorpha clade. Ma = million years before present. Dotted line indicates Precambrian/Cambrian boundary. Gray areas indicate Sturtian (left) and Marinoan (right) glaciations21.
