prokaryotes - bacteria see Domain Bacteria Woese et al. 1990
   Domain "Bacteria" Woese et al. 1990
     Phylum "Proteobacteria" Garrity et al. 2005 see Superphylum Proteobacteria Craig et al. 2010
       Class Gammaproteobacteria Garrity et al. 2005
         Order Alteromonadales Bowman and McMeekin 2005
           Family Pseudoalteromonadaceae Ivanova et al. 2004
             1 Genus Algicola Ivanova et al. 2004
             2 Genus Pseudoalteromonas Gauthier et al. 1995
             3 Genus Psychrosphaera Park et al. 2011