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 haloplanktis (ZoBell and Upham 1944) Reichelt and Baumann 1973 (Approved Lists 1980) see Pseudoalteromonas haloplanktis subsp. haloplanktis (ZoBell and Upham 1944) Gauthier et al. 1995
           1 Alteromonas haloplanktis subsp. tetraodonis see Pseudoalteromonas tetraodonis (Simidu et al. 1990) Ivanova et al. 2001