<p>This tree was generated from the analysis of conserved blocks of a whole genome alignment using BEAST v1.8.2 under the model of nucleotide substitution best supported by jModelTest v2.1.4, assuming a lognormal relaxed clock and using a speciation prior (birth-death) on the tree shape. The same topology was obtained using PhyML v3. PtrotPyV1 is highlighted in blue. Branch support values are reported above branches (bootstrap values/posterior probability). Root posterior probabilities are reported under branches in black half circles; the tree is rooted on the best supported root. A grey half circle pinpoints the position of the root as determined in another PhyML analysis including the closest available outgroup (the sea otter polyomavirus 1, NC_025259). The accession numbers of the sequences appearing in this figure are as follows: AB269859, AB767295, AB767299, AY386378, AY614708, DQ435829, JX159985, KJ577598 and KT184855.</p
