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 Alteromonadales Bowman and McMeekin 2005
                     Family Psychromonadaceae Ivanova et al. 2004 [monotypic]
                       Genus Psychromonasᵀ Mountfort et al. 1998
                         01 Psychromonas antarcticaᵀ corrig. Mountfort et al. 1998
                         02 Psychromonas aquimarina Miyazaki et al. 2008
                         03 Psychromonas arctica Groudieva et al. 2003
                         04 Psychromonas hadalis Nogi et al. 2007
                         05 Psychromonas heitensis Hosoya et al. 2008
                         06 Psychromonas ingrahamii Auman et al. 2006
                         07 Psychromonas japonica Miyazaki et al. 2008
                         08 Psychromonas kaikoae Nogi et al. 2002
                         09 Psychromonas macrocephali Miyazaki et al. 2008
                         10 Psychromonas marina Kawasaki et al. 2002
                         11 Psychromonas ossibalaenae Miyazaki et al. 2008
                         12 Psychromonas profunda Xu et al. 2003