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
               Phylum Negarnaviricota
                 Subphylum Polyploviricotina
                   Class Insthoviricetes [monotypic]
                     Order Articulavirales
                       Family Orthomyxoviridae
                         Genus Alphainfluenzavirus [monotypic]
                           Influenza A virusᵀ
                             1.1 influenza A(Hsw1N1) virus
                             1.1.1 influenza A(H1N1) virus
                             1.1.2 influenza A(H1N1)pdm09 virus
                             2.2 influenza A(H2N2) virus
                             3.2.1 influenza A(H3N2) virus
                             3.2.2 influenza A(H3N2)v virus
                             3.8 influenza A(H3N8) virus
                             5.1 avian influenza A(H5N1) virus
                             5.2 influenza A(H5N2) virus
                             5.2 influenza A(Hav5N2) virus
                             5.6 influenza A(H5N6) virus
                             5.8 influenza A(H5N8) virus
                             5.9 influenza A(H5N9) virus
                             7.1 influenza A(H7N1) virus
                             7.3 influenza A(H7N3) virus
                             7.4 influenza A(H7N4) virus
                             7.7 influenza A(H7N7) virus
                             7.9 avian influenza A(H7N9) virus
                             9.2 avian influenza A(H9N2) virus