Natura - nature
   actualia - actual entities
     Mundus Plinius - physical world
       naturalia - natural bodies
         Clade Biota Wagner 2004 [Wiemann, de Queiroz, Rowe, Planavsky, Anderson, Gogarten, Turner & Gauthier 2020]
           Domain Bacteria Woese et al. 2024
             Kingdom Pseudomonadati (Gibbons and Murray 1978) Oren and Göker 2024
               Phylum Pseudomonadotaᵀ Garrity et al. 2021
                 Class Alphaproteobacteria Garrity et al. 2006
                   Order Rhodobacterales Garrity et al. 2006
                     Family Roseobacteraceae Liang et al. 2021
                       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