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 Rhodobacterales Garrity et al. 2006 [monotypic]
                     Family Rhodobacteraceaeᵀ Garrity et al. 2006
                       Genus Oceanicola Cho and Giovannoni 2004
                         1 Oceanicola batsensis Cho and Giovannoni 2004
                         2 Oceanicola granulosus Cho and Giovannoni 2004
                         3 Oceanicola marinus Lin et al. 2007
                         4 Oceanicola nanhaiensis Gu et al. 2007
                         5 Oceanicola pacificus Yuan et al. 2009
                         6 Oceanicola nitratireducens Zheng et al. 2010
                         7 Oceanicola antarcticus Huo et al. 2014
                         8 Oceanicola flagellatus Huo et al. 2014