succinivibrionaceae succinivibrionaceae the succinivibrionaceae are gram-negative bacteria and belong to the gammaproteobacteria. they are rod-shaped and obligate anaerobes. succinivibrionaceae scientific classification domain: bacteria phylum: pseudomonadota class: gammaproteobacteria order: aeromonadales family: succinivibrionaceae genera anaerobiospirillum ruminobacter succinatimonas succinimonas succinivibrio