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"
             Family Microviridae
               [Genus Microvirusᵀ]
                 1 [Enterobacteria phage alpha3]
                 2 [Enterobacteria phage G4]
                 3 [Enterobacteria phage phiK]
                 4 [Enterobacteria phage phiX174ᵀ]
                 5 [Enterobacteria phage St-1]