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
               Order Picornavirales
                 Family Secoviridae
                   Genus Sequivirus
                     1 Carrot necrotic dieback virus
                     2 Dandelion yellow mosaic virus
                     3 Parsnip yellow fleck virusᵀ