| Author (and author names) | Published between | No. of references | No. of described taxa (valid) |
|---|---|---|---|
| Rögener, J. | 1994 | 1 | – |
| Roger, J. | 1857–1863 | 10 | 172 |
| Rogers, W. M. | 1987 | 1 | – |
| Rohe, W. | 1990 | 3 | – |
| Rohlfien, K. | 1979 | 1 | – |
| Rohrseitz, K. | 2000 | 1 | – |
| Rohwer, S. A. | 1917–1918 | 3 | – |
| Roig, X. | 2001–2013 | 2 | – |
| Roisin, Y. | 1985–2011 | 2 | – |
| Rojas-Fernández, P.; Rojas Fernández, P. | 1994–2009 | 5 | – |
| Rojas, P. | 2000–2009 | 2 | – |
| Rolland, J. | 2018 | 1 | – |
| Roller, P. P. | 1988 | 1 | – |
| Roma, G. C. | 2005 | 1 | – |
| Romand, B. E. de | – | – | – |
| Romani, R. | 2000 | 1 | – |
| Romero de Tejada, S. | 1989 | 1 | – |
| Romero, H. | 1989 | 1 | – |
| Romiguier, J. | 2018–2022 | 2 | – |
| Ronchetti, G. | 1955–1981 | 17 | – |
| Roncin, E. | 2002–2003 | 2 | 3 |
| Ronquist, F. | 1999–2011 | 2 | – |
| Room, P. M. | 1971–1975 | 2 | – |
| Roonwal, M. L. | 1976 | 1 | – |
| Roques, L. | 1976–1977 | 2 | – |
| Ros, J. | 1984 | 1 | – |
| Rosado, Á. | 2022 | 1 | – |
| Rosciszewski, K. | 1994–1995 | 4 | 2 |
| Rosenblatt, J. S. | 1970–1978 | 2 | – |
| Rosengren, M. | 1980 | 1 | – |
| Rosengren, R. | 1975–2005 | 17 | – |
| Rosi, M. R. | 1991 | 1 | – |
| Rosichon, U. | 2008 | 1 | – |
| Ross, E. S. | 1954 | 1 | – |
| Ross, H. H. | 1971–1973 | 2 | – |
| Ross, K. G. | 1985–2018 | 32 | 1 |
| Rossbach, M. H. | 1983 | 1 | – |
| Rossi de Garcia, E. | 1983 | 1 | 1 |
| Rossi, M. L. | 2009–2011 | 8 | – |
| Rossi, M.L. | 2012 | 1 | – |
| Rössler, W. | 2009–2020 | 3 | – |
| Rosso, E. | 2023 | 1 | – |
| Rosumek, F. B. | 2019–2023 | 2 | – |
| Rosumek, R. B. | – | – | – |
| Röszler, P. | 1935–1951 | 12 | 5 |
| Roth, D. S. | 1994 | 1 | – |
| Rothney, G. A. J. | 1889–1903 | 3 | – |
| Rotramel, G. L. | 1967–1971 | 2 | – |
| Roura-Pascual, N. | 2009 | 1 | – |
| Rouse, E. P. | 1969 | 1 | – |
| Roux, A. | 1989 | 1 | – |
| Roux, J. | 2014 | 1 | – |
| Roy, A. | 1999 | 1 | – |
| Roy, S. | 2020 | 1 | – |
| Roychowdhury, S.; Roy Chowdhury, S. | 1999–2006 | 3 | – |
| Ruangsittichai, J. | 2018 | 2 | 3 |
| Ruano, F.; Ruana, F. | 1992–2007 | 13 | 1 |
| Ruchirani, H. P. G. R. C. | 2011–2014 | 2 | – |
| Rudra, A. | 2018 | 1 | – |
| Rüger, M. | 2003 | 1 | – |