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 Procedovirinae
                   Genus Betanecrovirus
                     1 Beet black scorch virus
                     2 Leek white stripe virus
                     3 Tobacco necrosis virus Dᵀ