[viruses]
   Family Papillomaviridae
     Subfamily Firstpapillomavirinae
       Genus Lambdapapillomavirus
         1 Lambdapapillomavirus 1
         2 Lambdapapillomavirus 2ᵀ
         3 Lambdapapillomavirus 3
         4 Lambdapapillomavirus 4
         5 Lambdapapillomavirus 5