[viruses]
   Family Papillomaviridae
     Subfamily Firstpapillomavirinae
       Genus Deltapapillomavirus
         1 Deltapapillomavirus 1ᵀ
         2 Deltapapillomavirus 2
         3 Deltapapillomavirus 3
         4 Deltapapillomavirus 4
         5 Deltapapillomavirus 5
         6 Deltapapillomavirus 6
         7 Deltapapillomavirus 7