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
               Order Tymovirales
                 Family Betaflexiviridae
                   Subfamily Trivirinae [paraphyletic]
                     Genus Tepovirus
                       1 Potato virus Tᵀ
                       2 Prunus virus T