| Author (and author names) | Published between | No. of references | No. of described taxa (valid) |
|---|---|---|---|
| MacKay, W. P.; MacKay, W.; Mackay, W. P.; Mackay, W. | 1980–2020 | 102 | 141 |
| Mackay, W.P. | 1989–2019 | 2 | 3 |
| MacLeay, W. | 1873 | 1 | – |
| Macmillan, D. L. | 2013 | 1 | – |
| Madeira, J. | 2024 | 1 | – |
| Madel, W. | 1937 | 1 | – |
| Mader, H. J. | 1977 | 1 | – |
| Mader, Leopold | 1938 | 1 | – |
| Madl, M. | 2019–2021 | 2 | – |
| Madsen, H. B. | 2008 | 1 | – |
| Madureira, M. S. | 2003 | 1 | – |
| Maeda, A. | 1977 | 1 | – |
| Maelfait, J.-P. | 2002–2006 | 3 | – |
| Maes, J.-M. | 1993–2004 | 2 | – |
| Maeta, Y. | 1985 | 1 | – |
| Magalhães, F. S. | 2024 | 1 | – |
| Magalhães, L. E. de | 1971 | 1 | – |
| Magallón, S. | 2010 | 1 | – |
| Magomedovich, Y. Z. | 2020 | 1 | 1 |
| Magretti, P. | 1884 | 2 | – |
| Mahmoudi, Z. | 2018 | 1 | 1 |
| Mahunka, S. | 1981 | 1 | – |
| Mai, H. | 2022 | 1 | – |
| Maidl, F. | 1922 | 1 | – |
| Maier, C. W. | 1996 | 1 | – |
| Maile, R. | 1998–2000 | 2 | – |
| Maire, A. | 1993 | 1 | – |
| Maire, N. | 1997 | 1 | – |
| Mairif, M. | 2025 | 1 | – |
| Maiti, P. | 1970 | 1 | – |
| Majer, J. D.; Majer, J. | 1972–2015 | 34 | – |
| Major, R. E. | 2001 | 1 | – |
| Makhan, D. | 2007–2021 | 5 | 4 |
| Makio, T. | 2007 | 1 | – |
| Maksimov, A. A. | 1972 | 1 | – |
| Maldague, M. | 1966 | 1 | – |
| Malé, P-J. G. | 2010 | 1 | – |
| Malenovský, I. | 2017 | 1 | – |
| Malherbe, M. C. | 2001 | 1 | – |
| Malij, E. N. | 1990 | 1 | – |
| Mallik, B. | 1990 | 1 | – |
| Mallis, A. | 1937–1941 | 2 | – |
| Malloch, D. | 1999–2001 | 2 | – |
| Malone, G. | 2007 | 1 | – |
| Malosse, C. | 1997 | 1 | – |
| Malozemov, Y. A. | 1993 | 1 | – |
| Malozemova, L. A. | 1972–1993 | 2 | – |
| Malsch, A. K. F.; Malsch, A. | 2000–2008 | 3 | 1 |
| Malyshev, S. I. | 1954–1968 | 6 | – |
| Mamaev, B. M. | 1976 | 1 | – |
| Mamet, R. | 1954 | 1 | – |
| Man, P. | 2017–2024 | 2 | 4 |
| Manabe, K. | 1994 | 2 | – |
| Mancini, K. | 2007–2008 | 2 | – |
| Mandi, A. | 2022 | 1 | 1 |
| Mangaly, P. | 2024 | 1 | 1 |
| Mangold, J. R. | 1995 | 1 | – |
| Manly, B. F. J. | 1993 | 1 | – |
| Mann, W. M. | 1911–1948 | 33 | 225 |
| Mantero, G. | 1898–1911 | 6 | – |