| Genus | Species | Strains |
|---|---|---|
| Kabatiella | caulivora | 7314 9171 |
| zeae | 9664 9804 | |
| Kallichroma | tethys | 33109 |
| Kalmusia | scabrispora | 106237 |
| Kappamyces | cf. laurelensis | 103824 |
| Kernia | nitida | 8200 |
| ovata | 8792 | |
| pachypleura | 9864 30413 33037 | |
| Kickxella | alabastrina | 30215 |
| Kionochaeta | ramifera | 9947 |
| Kobayasia | nipponica | 9353 30352 |
| Kohlmeyeriella | crassa | 32133T 32134 |
| tubulata | 32149 32150 | |
| Koorchaloma | bambusae | 100546 |
| Kramasamuha | sibika | 30446 32770 |
| Kretzschmaria | deusta | 104995 |
| Kuehneromyces | mutabilis | 30748 |