[viruses]
   Realm Riboviria
     Order Tymovirales
       Family Betaflexiviridae
         Subfamily Quinvirinae
           1 Genus Carlavirus
           2 Genus Foveavirus
           3 Genus Robigovirus
           4 Banana mild mosaic virus
           5 Banana virus X
           6 Sugarcane striate mosaic-associated virus