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
       Genus Alteromonasᵀ Baumann et al. 1972 (Approved Lists 1980)
         "Alteromonas putrefaciens" (ex Derby and Hammer 1931) Lee et al. 1981 see Shewanella putrefaciens (Lee et al. 1981) MacDonell and Colwell 1986