[viruses]
   Realm Riboviria
     Order Nidovirales
       Suborder Cornidovirineae [monotypic]
         Family Coronaviridae
           Subfamily Letovirinae [monotypic]
             Genus Alphaletovirus [monotypic]
               Subgenus Milecovirus [monotypic]
                 1 Microhyla letovirus 1ᵀ