Figure 2.

Ultrametric tree of Caprinae derived from the cytochrome b maximum-likelihood tree. The geological date of the isolation of the Myotragus lineage in the Balearic islands 5.35 Mya, that was used as a calibration point, is highlighted. Calculated dates and standard deviations are given for some important splits in the tree. A lineages through time plot is shown under the tree. The number of lineages in each node is show in logarithmic scale. The horizontal scale bar represents 1 Mya for both the tree and the lineages through time plot.