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"
             ["DNA viruses"]
               1 ["ssDNA viruses"]
               1.6.0 [[unranked] "Picodnaviruses"] see Family Parvoviridae
               2 ["dsDNA viruses"]
               2.18.0 [Family Papovaviridae] see Family Papillomaviridae