[viruses]
   Realm Riboviria
     Order Nidovirales
       Suborder Cornidovirineae [monotypic]
         Family Coronaviridae
           Subfamily Orthocoronavirinae
             Genus Alphacoronavirus
               Subgenus Minacovirus
                 1 Ferret coronavirus
                 2 Mink coronavirus 1