Divergence times among 12 collodarian sequences, based on the estimation of the partitioned Bayesian approach.

<p>Estimated divergence ages (million years ago) are shown at the root of each node. Gray shaded boxes on the nodes indicate 95% credible intervals. Star symbols represent the first appearance dates of Collosphaeridae and Collozoidae, as inferred from the fossil record <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0035775#pone.0035775-Bjrklund1" target="_blank">[20]</a>, <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0035775#pone.0035775-Riedel1" target="_blank">[21]</a>.