Additional file 1.

Branch size and mean depth examples. The values of the branch size, A and of the mean depth, d, are shown (in brackets, as (A,d)) at each node of a fully balanced 15-tip phylogenetic tree (a), a fully imbalanced 15-tip phylogenetic tree (b), a 15-tip subtree of a real phylogenetic tree.

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Herrada et al. BMC Evolutionary Biology 2011 11:155   doi:10.1186/1471-2148-11-155