pseudoalteromonas flavipulchra pseudoalteromonas flavipulchra pseudoalteromonas flavipulchra is a rod-shaped gram-negative marine bacterium. pseudoalteromonas flavipulchra scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: alteromonadales family: pseudoalteromonadaceae genus: pseudoalteromonas binomial name pseudoalteromonas flavipulchraivanova et al., 2002