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"
             Realm Riboviria
               Family Tombusviridae
                 Subfamily Calvusvirinae [monotypic]
                   Genus Umbravirus
                     1 Carrot mottle mimic virus
                     2 Carrot mottle virusᵀ
                     3 Ethiopian tobacco bushy top virus
                     4 Groundnut rosette virus
                     5 Lettuce speckles mottle virus
                     6 Opium poppy mosaic virus
                     7 Pea enation mosaic virus 2
                     8 Tobacco bushy top virus
                     9 Tobacco mottle virus