[viruses]
   Realm Riboviria
     Order Nidovirales
       Suborder Arnidovirineae [monotypic]
         Family Arteriviridae
           Subfamily Variarterivirinae
             Genus Betaarterivirus
               Subgenus Chibartevirus
                 1 Betaarterivirus chinrav 1
                 2 Betaarterivirus ninrav