Gram-positive rods, cells are 0.2–0.8 × 1.0–3.1 µm, occurring as single cells, in short chains or in clumps. No spores are formed. Non-motile. Strictly anaerobic and asaccharolytic. Very poor growth in broth medium. Colonies on brain heart infusion agar (BHI)-blood agar plates are minute (<1 mm in diameter), circular, convex and translucent even after prolonged incubation in an anaerobic glove box (7–10 d). No haemolysis occurs around colonies on BHI-blood agar plates. Catalase-negative. Metabolic end product in peptone/yeast extract/glucose medium is phenylacetate. Members of the genus Mogibacterium can be distinguished from each other by 16S rRNA sequences and DNA–DNA homology values.
DNA G+C content (mol%): 41–50.
Type species: Mogibacterium pumilum
Microbial Abundance Data: Mogibacterium (Percent of total population with standard deviation [PMID: 22698087])