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 "Alphaproteobacteria" Garrity et al., 2006 [monotypic]
                 Class Alphaproteobacteriaᵀ Garrity et al. 2006
                   Order Sneathiellales Kurahashi et al. 2008 [monotypic]
                     Family Sneathiellaceaeᵀ Kurahashi et al. 2008
                       Genus Oceanibacterium Balcázar et al. 2013 [monotypic]
                         Oceanibacterium hippocampiᵀ Balcázar et al. 2013