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 Polyomaviridae
               [Genus Polyomavirusᵀ]
                 ["BK virus"] see BK polyomavirus
                 [Budgerigar fledgling disease virus ICTV 7th Report (2000)] see Budgerigar fledgling disease polyomavirus
                 ["JC virus"] see JC polyomavirus
                 ["K virus"]
                 ["Polyoma virus"ᵀ]
                 ["RK Virus"]
                 ["SV40 virus"] see Simian virus 40
                 ["vacuolating Virus"] see Simian virus 40
                 01 African green monkey polyomavirus
                 02 Baboon polyomavirus 2
                 03 BK polyomavirus
                 04 Bovine polyomavirus
                 05 Budgerigar fledgling disease polyomavirus
                 06 Hamster polyomavirus
                 07 Human polyomavirus
                 08 JC polyomavirus
                 09 Murine pneumotropic virus
                 10 Murine polyomavirus
                 11 Rabbit kidney vacuolating virus
                 12 Simian virus 12
                 13 Simian virus 40ᵀ