| Genus | Species Num | Strain Num | SOURCE |
|---|---|---|---|
| Kosmotoga | 1 | 1 | HMP |
| Kribbella | 1 | 1 | HMP |
| Ktedonobacter | 1 | 1 | HMP |
| Kurthia | 2 | 2 | MGYG |
| Kyrpidia | 1 | 1 | HMP |
| Kytococcus | 1 | 1 | HMP |
| Lachnoanaerobaculum | 2 | 2 | MGYG |
| Lachnoclostridium | 5 | 6 | HMP/MGYG |
| Lachnospira | 1 | 2 | HMP/MGYG |
| Lacrimispora | 1 | 2 | HMP/MGYG |