microbulbifer elongatus microbulbifer elongatus microbulbifer elongatus is a gram-negative marine bacterium. microbulbifer elongatus scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: alteromonadales family: alteromonadaceae genus: microbulbifer species: m. elongatus binomial name microbulbifer elongatus(humm 1946) yoon et al. 2003 synonyms pseudomonas elongata humm 1946