Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           ?"viruses"
             Family Papillomaviridae
               Subfamily Firstpapillomavirinae
                 Genus Betapapillomavirus
                   1 Betapapillomavirus 6
                   2.1 Betapapillomavirus 1ᵀ
                   2.2.1 Betapapillomavirus 2
                   2.2.2.1 Betapapillomavirus 3
                   2.2.2.2.1 Betapapillomavirus 5
                   2.2.2.2.2 Betapapillomavirus 4