| Part 9 Gram Negative Anaerobic Bacteria |
| Family I Bacteriodaceae |
| Genus I Bacteriodes |
| Genus II Fusobacterium |
| Genus I Leptotrichia |
| Incertae Sedis |
| Genus I Desulfovibrio |
| Genus II Butyrivibrio |
| Genus III Succinivibrio |
| Genus IV Succinimonas |
| Genus I Lachnospira |
| Genus I Selenomonas |
