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"
             Order Ligamenvirales
               Family Rudiviridae [monotypic]
                 Genus Rudivirusᵀ
                   1 Sulfolobus islandicus rod-shaped virus 1
                   2.1 Sulfolobus islandicus rod-shaped virus 2ᵀ
                   2.2 Acidianus rod-shaped virus 1