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] Closterovirus Group] see Family Closteroviridae
                 1 ?["apple chlorotic leafspot virus"] see Apple chlorotic leaf spot virus
                 2 "Festuca Necrosis Virus"