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
       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