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"
             Family Nanoviridae
               Genus Nanovirusᵀ
                 1 Subterranean clover stunt virusᵀ
                 2.1.1 Pea yellow stunt virus
                 2.1.2 Pea necrotic yellow dwarf virus
                 2.2.1 Black medic leaf roll virus
                 2.2.2.1 Faba bean necrotic stunt virus
                 2.2.2.2.1 Faba bean yellow leaf virus
                 2.2.2.2.2.1 Milk vetch dwarf virus
                 2.2.2.2.2.2 Faba bean necrotic yellows virus