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
               Phylum Negarnaviricota
                 Subphylum Haploviricotina
                   1 Class Monjiviricetes
                   2 Class Milneviricetes [monotypic]
                   3 Class Chunqiuviricetes [monotypic]
                   4 Class Yunchangviricetes [monotypic]