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 Cystoviridae [monotypic]
                 Genus Cystovirusᵀ
                   1 Pseudomonas virus phi6ᵀ
                   2 Pseudomonas virus phi8
                   3 Pseudomonas virus phi12
                   4 Pseudomonas virus phi13
                   5 Pseudomonas virus phi2954
                   6 Pseudomonas virus phiNN
                   7 Pseudomonas virus phiYY