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 Pseudomonadales Orla-Jensen 1921 (Approved Lists 1980)
                     Family Moraxellaceae Rossau et al. 1991
                       Genus Faucicola Humphreys et al. 2015
                       1 Genus Moraxellaᵀ Lwoff 1939 (Approved Lists 1980)
                       2 Genus Acinetobacter Brisou and Prévot 1954 (Approved Lists 1980)
                       3 Genus Alkanindiges Bogan et al. 2003 [monotypic]
                       4 Genus Enhydrobacter Staley et al. 1987 [monotypic]
                       5 Genus Paraperlucidibaca Oh et al. 2011
                       6 Genus Perlucidibaca Song et al. 2008 [monotypic]
                       7 Genus Psychrobacter Juni and Heym 1986