| Ichthyenterobacterium sp. | RD000880 |
| Ideonella sp. | RD001766, RD001861, RD001863 |
| Idiomarina sp. | RD002040 |
| Idriella sp. | RD001026, RD009312, RD009364, RD009481, RD009620, RD010108, RD051406, RD053298, RD053307, RD057041, RD060299 |
| Ilyonectria sp. | RD001954, RD002233, RD009072, RD009123, RD009638, RD051709, RD053490, RD053569, RD054398, RD056480, RD057843, RD057848 |
| Immersiella sp. | RD060521 |
| Induratia sp. | RD015290, RD015315, RD015337 |
| Intestinibacter sp. | RD015181 |
| Intestinimonas sp. | RD014241, RD014902 |
| Intrasporangium sp. | RD000789, RD010957, RD010962 |
| Irpex sp. | RD012681, RD015330, RD058268, RD061157, RD061206, RD061221, RD061237 |
| Isaria sp. | RD001179, RD001180, RD001191, RD001192, RD001193, RD055182 |
| Isoptericola sp. | RD004316, RD005517, RD005524, RD005530, RD005535, RD007222, RD010889, RD010890, RD010927, RD010939, RD010953, RD010956, RD010960, RD011215, RD012645, RD054983, RD055624 |
| Isthmolongispora sp. | RD009054, RD051865, RD052295, RD052431, RD052744, RD054486 |
| Itersonilia sp. | RD051127, RD051128, RD051129, RD051135, RD051138 |
