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] Carlavirus Group] see Genus Carlavirus
                 1 ?"chicory blotch virus"
                 1 ?"Cynodon Mosaic Virus"
                 1 ?"elderberry Virus"
                 1 ?"Narcissus Latent Virus"
                 2 "cactus virus"