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"
             Order Caudovirales
               Family Siphoviridae
                 Genus Doucettevirus
                   1 Propionibacterium virus B22
                   2 Propionibacterium virus Doucetteᵀ
                   3 Propionibacterium virus E6
                   4 Propionibacterium virus G4