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 Haploviricotina
                   Class Monjiviricetes
                     Order Mononegavirales
                       Family Paramyxoviridae
                         [Subfamily Pneumovirinae] see Family Pneumoviridae
                           [Genus Pneumovirusᵀ]
                             ["pneumonia virus"]
                             ["respiratory syncytial virus (cattle)"] see Bovine respiratory syncytial virus
                             ["respiratory syncytial virus (humans)"ᵀ] see Human respiratory syncytial virus
                             1 [Bovine respiratory syncytial virus] see Bovine orthopneumovirus
                             2 [Human respiratory syncytial virusᵀ]
                             3 [Murine pneumonia virus]