[viruses]
   Realm Riboviria
     Order Nidovirales
       Suborder Mesnidovirineae
         Family Medioniviridae
           Subfamily Tunicanivirinae [monotypic]
             Genus Bolenivirus [monotypic]
               Subgenus Balbicanovirus [monotypic]
                 1 Botrylloides leachii nidovirusᵀ