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 citrea Gauthier 1977 (Approved Lists 1980) see Pseudoalteromonas citrea (Gauthier 1977) Gauthier et al. 1995