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 "Vibrionales" Garrity & Holt, 2001 [monotypic]
                     Family Vibrionaceaeᵀ Véron 1965 (Approved Lists 1980)
                       Genus Photobacterium Beijerinck 1889 (Approved Lists 1980)
                         Photobacterium damselae corrig. (Love et al. 1982) Smith et al. 1991
                           Photobacterium damselae subsp. piscicida corrig. (ex Janssen and Surgalla 1968) Gauthier et al. 1995