[viruses]
   Realm Riboviria
     Phylum Negarnaviricota
       Subphylum Haploviricotina
         Class Monjiviricetes
           Order Mononegavirales
             Family Pneumoviridae
               Genus Metapneumovirus
                 1 Avian metapneumovirusᵀ
                 2 Human metapneumovirus