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 Pseudoalteromonas Gauthier et al. 1995 [Pseudoalteromonas haloplanktis] (ZoBell and Upham 1944) Gauthier et al. 1995 Pseudoalteromonas haloplanktis subsp. haloplanktisᵀ (ZoBell and Upham 1944) Gauthier et al. 1995 see Pseudoalteromonas haloplanktis (ZoBell and Upham 1944) Gauthier et al. 1995