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 Oceanospirillales Garrity et al. 2005
                     Genus Motiliproteus Wang et al. 2015, incertae sedis
                     1 Genus Spongiispira Kaesler et al. 2008, incertae sedis [monotypic]
                     2 Genus Salicola Maturrano et al. 2006, incertae sedis
                     3 Family Oceanospirillaceaeᵀ Garrity et al. 2005
                     4 Family Alcanivoracaceae corrig. Golyshin et al. 2005
                     5 Family Hahellaceae Garrity et al. 2005
                     6 Family Halomonadaceae Franzmann et al. 1989
                     7 Family Litoricolaceae Kim et al. 2007 [monotypic]
                     8 Family Oleiphilaceae Golyshin et al. 2002 [monotypic]
                     9 Family "Saccharospirillaceae" Garrity et al., 2003 [monotypic]