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 Pospiviroidae
                 Genus Pospiviroidᵀ
                   1 Chrysanthemum stunt viroid
                   2 Citrus exocortis viroid
                   3 Columnea latent viroid
                   4 Iresine viroid 1
                   5 Pepper chat fruit viroid
                   6 Potato spindle tuber viroidᵀ
                   7 Tomato apical stunt viroid
                   8 Tomato chlorotic dwarf viroid
                   9 Tomato planta macho viroid