Class Proteobacteria Stackebrandt et al. 1988 see Phylum Proteobacteria Garrity and Holt 2001
   Subclass gamma see Class Gammaproteobacteria nom. inval.
     Family Alteromonadaceae Ivanova and Mikhailov 2001
       1 Genus Alteromonasᵀ Baumann et al. 1972 (Approved Lists 1980)
       2 Genus Pseudoalteromonas Gauthier et al. 1995
       3 Genus Idiomarina Ivanova et al. 2000
       4 Genus Colwellia Deming et al. 1988
       5 Genus Pseudomonas Migula 1894 (Approved Lists 1980)
       6 Genus Marinomonas van Landschoot and De Ley 1984
       7 Genus Shewanella MacDonell and Colwell 1986
       8 Genus Glaciecola Bowman et al. 1998