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"
             ["plant viruses"]
               [[unranked] Ilarvirus Group] see Genus Ilarvirus
                 Subgroup B
                   "cherry rugose mosaic virus"
                   "Danish plum line pattern virus"
                   "hop virus A"
                   "hop virus C"
                   "rose mosaic virus"