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 Helsingorvirus
                   1 Cellulophaga virus Cba121
                   2 Cellulophaga virus Cba171
                   3 Cellulophaga virus Cba181ᵀ