Class Proteobacteria Stackebrandt et al. 1988 nom. rej. see Phylum Proteobacteria Garrity and Holt 2001 nom. nud.
   Subclass gamma see Class Gammaproteobacteria "Garrity and Holt 2001" nom. nud.
     Family Alteromonadaceae Ivanova and Mikhailov 2001
       Genus Alteromonasᵀ Baumann et al. 1972 (Approved Lists 1980)
         Alteromonas espejiana Chan et al. 1978 (Approved Lists 1980) see Pseudoalteromonas espejiana (Chan et al. 1978) Gauthier et al. 1995