Fig. 3: Time-calibrated phylogeny from the tip-dating analysis with mean per-branch rates of discrete character evolution mapped to indicate low (blue colors) vs. high rates (red colors) of morphological evolution inferred from a model allowing each branch to have its own rate of change.
From: Miniaturization during a Silurian environmental crisis generated the modern brittle star body plan
The star indicates the branch with the highest rate in the tree (rate multiplier = 24.76), which links Ophiopetagno paicei and Muldaster haakei and occurs concomitant with the Mulde Event.
