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]
           Domain Bacteria Woese et al. 1990 [paraphyletic?]
             Superphylum "Proteobacteria" Craig et al. 2010
               Phylum "Gammaproteobacteria" Garrity et al., 2005 [monotypic]
                 Class Gammaproteobacteriaᵀ Garrity et al. 2005
                   Order Pasteurellales Garrity et al. 2005 [monotypic]
                     Family Pasteurellaceaeᵀ Pohl 1981
                       Genus Avibacterium Blackall et al. 2005
                         1 Avibacterium avium (Hinz and Kunjara 1977) Blackall et al. 2005
                         2 Avibacterium endocarditidis Bisgaard et al. 2007
                         3 Avibacterium gallinarum (Hall et al. 1955) Blackall et al. 2005
                         4 Avibacterium paragallinarum (Biberstein and White 1969) Blackall et al. 2005
                         5 Avibacterium volantium (Mutters et al. 1985) Blackall et al. 2005