Class Proteobacteria Stackebrandt et al. 1988 nom. rej. see Phylum Proteobacteria Garrity and Holt 2001 nom. nud.
   Subclass gamma see Class Gammaproteobacteria "Garrity and Holt 2001" nom. nud.
     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 nom. cons. (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