[viruses]
   Realm Riboviria
     Order Nidovirales
       Suborder Monidovirineae [monotypic]
         Family Mononiviridae [monotypic]
           Subfamily Mononivirinae [monotypic]
             Genus Alphamononivirus [monotypic]
               Subgenus Dumedivirus [monotypic]
                 Planidovirus 1ᵀ