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 Shewanella MacDonell and Colwell 1986 1 Shewanella putrefaciens (Lee et al. 1981) MacDonell and Colwell 1986