Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           ?viruses
             Realm Riboviria
               Order Nidovirales
                 Suborder Cornidovirineae [monotypic]
                   Family Coronaviridae
                     Subfamily Orthocoronavirinae
                       Genus Deltacoronavirus
                         Subgenus Buldecovirus
                           1.1 Bulbul coronavirus HKU11ᵀ
                           1.2 White-eye coronavirus HKU16
                           2.1 Munia coronavirus HKU13
                           2.2 Coronavirus HKU15