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 influenza A(H2N2) virus (Isolate) "human influenza A/1957 (H2N2) virus"