| Isthmolongispora Matsush., 1971 |
| Isthmolongispora variabilis Matsush., 1975 |
| Isthmotricladia Matsush., 1971 |
| Isthmotricladia gombakiensis Nawawi, 1975 |
| Ityorhoptrum P. M. Kirk, 1986 |
| Ityorhoptrum verruculosum (M. B. Ellis) P. M. Kirk, 1986 |
| Junewangia W. A. Baker & Morgan-Jones, 2002 |
| Junewangia globulosa (Tóth) W. A. Baker & Morgan-Jones, 2002 |
| Junewangia lamma (Whitton, McKenzie & K. D. Hyde) W. A. Baker & Morgan-Jones, 2002 |
| Junewangia martinii (J. L. Crane & Dumont) W. A. Baker & Morgan-Jones, 2002 |
| Junewangia queenslandica (Matsush.) J.W. Xia & X.G. Zhang, 2017 |
| Katodinium Fott, 1957 |
| Katodinium glaucum (Lebour) Loebl., 1965 |
| Katodinium rotundatum (Lohmann) A.R. Loebl. III, 1965 |
| Khuskia H. J. Huds., 1963 |
| Khuskia oryzae H. J. Huds., 1963 |
| Kionochaeta P. M. Kirk & B. Sutton, 1986 |
| Kionochaeta ramifera (Matsush.) P. M. Kirk & B. Sutton, 1986 |
| Kionochaeta spissa P. M. Kirk & B. Sutton, 1986 |
| Kodamaea Y. Yamada, Tom. Suzuki, M. Matsuda & Mikata, 1995 |