pseudoalteromonas aurantia pseudoalteromonas aurantia pseudoalteromonas aurantia is an antibacterial-producing marine bacterium commonly found in mediterranean waters. in 1979, gauthier and breittmayer first named it alteromonas aurantia to include it in the genus alteromonas that was described seven years earlier, in 1972 by baumann et al. in 1995, gauthier et al renamed alteromonas aurantia to pseudoalteromonas aurantia to include it in their proposed new genus, pseudoalteromonas, which they recommended splitting from alteromonas. pseudoalteromonas aurantia scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: alteromonadales family: pseudoalteromonadaceae genus: pseudoalteromonas binomial name pseudoalteromonas aurantia(gauthier and breittmayer 1979) gauthier et al., 1995 synonyms alteromonas aurantiagauthier and breittmayer, 1979pseudomonas aurantia gauthier et al., 1995