[viruses]
   Realm Riboviria
     Order Nidovirales
       Suborder Cornidovirineae [monotypic]
         Family Coronaviridae
           Subfamily Orthocoronavirinae
             Genus Deltacoronavirus
               1 Subgenus Andecovirus [monotypic]
               2 Subgenus Buldecovirus
               3 Subgenus Herdecovirus [monotypic]
               4 Subgenus Moordecovirus [monotypic]