Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         [crown] Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           ?"viruses"
             Realm Riboviria
               Family Flaviviridae
                 Genus Pestivirus
                   01 Pestivirus Aᵀ
                   02 Pestivirus B
                   03 Pestivirus C
                   04 Pestivirus D
                   05 Pestivirus E
                   06 Pestivirus F
                   07 Pestivirus G
                   08 Pestivirus H
                   09 Pestivirus I
                   10 Pestivirus J
                   11 Pestivirus K