| uncultured alpha proteobacterium | No | no rank | bacteria | environmental samples | species | 91750 | click here |
| uncultured beta proteobacterium | No | no rank | bacteria | environmental samples | species | 86027 | click here |
| uncultured clostridia bacterium | No | no rank | bacteria | environmental samples | species | 244328 | click here |
| uncultured gamma proteobacterium | No | no rank | bacteria | environmental samples | species | 86473 | click here |