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 avian influenza A(H5N1) virus (Isolate) avian influenza A/pigeon/Samut Prakan/Thailand/CU-202/2004 (H5N1) virus 2004