| Monomorium zhinu | Terayama, 2009 | 155, fig. 213 | w. | TAIWAN |  | 
| Monomorium zulu | Santschi, 1914e | 18 | w. | SOUTH AFRICA |  | 
| Morleyidris | Donisthorpe, 1944c | 64 |  |  | [as subgenus of Polyrhachis] | 
| Mutilla | Linnaeus, 1758 | 582 |  |  |  | 
| Mutilla (Labidus) fulvescens | Blanchard, 1846 | pl. 118, fig. 2 | m. | BRAZIL |  | 
| Mutilla dorylus | Lamarck, 1817 | 101 | m. | SOUTH AFRICA |  | 
| Myagroteras | Moffett, 1985b | 31 |  |  | [as subgenus of Myrmoteras] | 
| †Myanmyrma | Engel & Grimaldi, 2005 | 13 |  |  |  | 
| †Myanmyrma gracilis | Engel & Grimaldi, 2005 | 14, figs. 1, 9 | w. | MYANMAR (Burmese Amber, Cretaceous) |  | 
| Mycetagroicus | Brandão & Mayhé-Nunes, 2001 | 641 |  |  |  | 
| Mycetagroicus cerradensis | Brandão & Mayhé-Nunes, 2001 | 644, figs. 1-7 | w. | BRAZIL (São Paulo) |  | 
| Mycetagroicus inflatus | Brandão & Mayhé-Nunes, 2008 | 349, figs. 1-4 | w. | BRAZIL (Pará) |  | 
| Mycetagroicus triangularis | Brandão & Mayhé-Nunes, 2001 | 649, figs. 8-16 | w.q. | BRAZIL (Mato Grosso) |  | 
| Mycetagroicus urbanus | Brandão & Mayhé-Nunes, 2001 | 657, figs. 17-23 | w. | BRAZIL (São Paulo) |  | 
| Mycetarotes | Emery, 1913c | 251 |  |  | [as subgenus of Cyphomyrmex] | 
| Mycetarotes acutus | Mayhé-Nunes, 1995 | 198, fig. 1 | w. | BRAZIL (Amazonas) |  | 
| Mycetarotes carinatus | Mayhé-Nunes, 1995 | 200, fig. 3 | w. | BRAZIL (Rio de Janeiro) |  | 
| Mycetarotes senticosus | Kempf, 1960d | 282, figs. 4-6 | w. | BRAZIL (São Paulo, Rio de Janeiro, Santa Catarina) |  | 
| Mycetomoellerius | Solomon et al., 2019 | 950 |  |  |  | 
| Mycetomoellerius janildae | Dos Santos et al., 2025 | 99, figs. 3-7, 10 | w.q.m. | BRAZIL (Minas Gerais, Bahia) |  | 
| Mycetomoellerius mesopleuralis | Dos Santos et al., 2025 | 105, figs. 8, 10 | w. | BRAZIL (São Paulo) |  | 
| Mycetomoellerius mikromelanos | Cardenas et al., 2021 | 13, figs. 1-3, tabs. 2-4 | w.q.m. | PANAMA |  | 
| Mycetomyrmicinae | Forel, 1917 | 246 |  |  | [as "section" of Myrmicinae] | 
| Mycetophylax | Emery, 1913c | 251 |  |  | [as subgenus of Cyphomyrmex] | 
| Mycetophylax bolivari | Weber, 1948b | 84 | w. | VENEZUELA |  | 
| Mycetophylax brittoni var. littoralis | Weber, 1937 | 401 | w.m. | TRINIDAD |  | 
| Mycetophylax bruchi var. pauper | Santschi, 1923c | 268 |  |  |  | 
| Mycetophylax cristulatus var. emmae | Santschi, 1929d | 304 | w. | ARGENTINA (Catamarca) |  | 
| Mycetophylax emeryi st. hubrichi | Santschi, 1925e | 163, fig. 6 | w. | ARGENTINA (Santa Fe) |  | 
| Mycetophylax emeryi st. weiseri | Santschi, 1929d | 303 | w. | ARGENTINA (Catamarca) |  | 
| Mycetophylax glaber | Weber, 1948b | 85 | w. | BOLIVIA |  | 
| Mycetophylax hummelincki | Weber, 1948b | 84 | w. | VENEZUELA |  | 
| Mycetosoritis | Wheeler, 1907d | 714 |  |  | [as subgenus of Atta] | 
| Mycetosoritis explicata | Kempf, 1968b | 401, figs. 14-16 | w. | BRAZIL (Goiás) |  | 
| Mycetosoritis vinsoni | Mackay, 1998c | 421, figs. 1, 2 | w. | COSTA RICA |  | 
| Mychothorax | Ruzsky, 1904a | 288 |  |  |  | 
| Mychothorax acervorum subsp. orientalis | Kuznetsov-Ugamsky, 1928b | 31 | w. | RUSSIA (Ussuri) |  | 
| Mychothorax acervorum var. vandeli | Bondroit, 1920a | 153 | w.q. | FRANCE |  | 
| Mychothorax muscorum subsp. oceanicum | Kuznetsov-Ugamsky, 1928b | 29 | w. | RUSSIA (Primorsky Region) |  | 
| Mycocepurus | Forel, 1893h | 602 |  |  | [as subgenus of Atta] | 
| Mycocepurus bolivianus | Weber, 1938b | 155, fig. 8 | w. | BOLIVIA |  | 
| Mycocepurus castrator | Rabeling & Bacci, 2010 | 382, figs. 1A,C,E, 2A,C,E,G | q.m. | BRAZIL (São Paulo) |  | 
| Mycocepurus curvispinosus | Mackay, 1998c | 423, figs. 5, 6, 9 | w. | COSTA RICA |  | 
| Mycocepurus goeldii st. gentilis | Santschi, 1925b | 17 | w. | BRAZIL (Minas Gerais) |  | 
| Mycocepurus manni | Weber, 1938b | 156, figs. 1, 2 | q. | BOLIVIA |  | 
| Mycocepurus obsoletus | Emery, 1913c | 252, fig. 1 | w. | BRAZIL (Pará) |  | 
| Mycocepurus ogloblini | Santschi, 1933f | 119, figs. 12, 13 | w.q. | ARGENTINA (Misiones) |  | 
| Mycocepurus reconditus | Borgmeier, 1937b | 246, figs. 34-36 | w.q. | BRAZIL (Bahia) |  | 
| Mycocepurus smithi var. trinidadensis | Weber, 1937 | 378, fig. 1 | w.q. | TRINIDAD |  | 
| Mycocepurus smithii var. eucarnitae | Forel, 1913m | 235 | w. | CUBA |  |