Fig. 3: Migration and dating.
From: More than one species of the naked mole-rat, a new biomedical model

A Multispecies coalescent tree with branches (extant species and their ancestors) represented by rectangles whose lengths are proportional to time (difference between τs of the bounding nodes) and their widths to half the population size parameters (\(\theta /2\)) Rectangle shapes thus reflect branch lengths in coalescent units. The arrow indicates the only supported migration with the posterior mean of its rate. B The time-calibrated tree of all extant bathyergids as estimated under the fossilized birth-death model (Petromus and Thryonomys were omitted from the figure).