[viruses]
   Realm Riboviria
     Order Nidovirales
       Suborder Arnidovirineae [monotypic]
         Family Arteriviridae
           Subfamily Simarterivirinae
             1 Genus Deltaarterivirus
             2 Genus Epsilonarterivirus
             3 Genus Etaarterivirus [monotypic]
             4 Genus Iotaarterivirus
             5 Genus Thetaarterivirus
             6 Genus Zetaarterivirus [monotypic]