propionivibrio dicarboxylicus propionivibrio dicarboxylicus propionivibrio dicarboxylicus is a gram negative, strictly anaerobic, non-spore-forming bacterium from the genus of propionivibrio which was isolated from anaerobic mud from the lake kasumigaura in japan. propionivibrio dicarboxylicus scientific classification domain: bacteria phylum: pseudomonadota class: betaproteobacteria order: rhodocyclales family: rhodocyclaceae genus: propionivibrio species: p. dicarboxylicus binomial name propionivibrio dicarboxylicustanaka et al. 1991 type strain cremal1, dsm 5885, jcm 12339, jcm 7784