| Quadcuspibothrium francisi Jensen, 2001 |
| Repetophragma Subram., 1992 |
| Repetophragma inflatum (Berk. & Ravenel) W.P. Wu, 2005 |
| Repetophragma paracambrense R.F. Castañeda, Heredia & McKenzie, 2011 |
| Repetophragma subulatum (Cooke & Ellis) Subram., 1992 |
| Resinicium Parmasto, 1968 |
| Resinicium bicolor (Alb. & Schwein.) Parmasto, 1968 |
| Rhexoacrodictys W. A. Baker & Morgan-Jones, 2002 |
| Rhexoacrodictys erecta (Ellis & Everh.) W. A. Baker & Morgan-Jones, 2002 |
| Rhexoacrodictys queenslandica (Matsush.) W.A. Baker & Morgan-Jones, 2002 |
| Rhinocladium Sacc. & Marchal, 1885 |
| Rhinocladium mexicanum Mercado, Heredia & J. Mena, 1997 |
| Rhinotrichum Corda, 1837 |
| Rhinotrichum mexicanum Guzmán, 1982 |
| Rhodosporidium I. Banno, 1967 |
| Rhodosporidium toruloides I. Banno, 1967 |
| Rhodotorula F. C. Harrison, 1927 |
| Rhodotorula buffonii (C. Ramírez) Roeijmans, Eijk & Yarrow, 1989 |
| Rhodotorula glutinis (Fresen.) F. C. Harrison, 1928 |
| Rhodotorula mucilaginosa (A. Jörg.) F. C. Harrison, 1928 |