VP3-less polyomaviruses are a distinct monophyletic clade.

<p>A neighbor-joining tree was constructed based on a MUSCLE alignment of the complete genome sequences of representatives of known polyomavirus species. Species were assigned nicknames based on common English names of host organisms (for naming key see <a href="http://www.plospathogens.org/article/info:doi/10.1371/journal.ppat.1003558#ppat.1003558.s006" target="_blank">Table S1</a>). Host species thought to have shared a common ancestor within the past 35 million years are assigned common colors. Host animal species shown in black were excluded from the color-coding scheme. The two lobes of the apparently VP3-less clade are shaded.