| Pheidole mooreorum Wilson, 2003 |
| Pheidole morelosana Wilson, 2003 |
| Pheidole morrisii Forel, 1886 |
| Pheidole morrisii var. dentata Mayr, 1886 |
| Pheidole morrisii var. impexa Wheeler, 1908 |
| Pheidole morrisii var. vanceae Forel, 1901 |
| Pheidole nasutoides Hölldobler & Wilson, 1992 |
| Pheidole nebulosa Wilson, 2003 |
| Pheidole nevadensis Forel, 1901 |
| Pheidole nitidicollis Emery, 1896 |
| Pheidole nubicola Wilson, 2003 |
| Pheidole nuculiceps Wheeler, 1908 |
| Pheidole oaxacana Wilson, 2003 |
| Pheidole obscurior Forel, 1886 |
| Pheidole obturaculum Longino, 2019 |
| Pheidole obtusospinosa Pergande, 1896 |
| Pheidole opaca subsp. apterostigmoides Weber, 1943 |
| Pheidole opaca subsp. sarrita Forel, 1908 |
| Pheidole opaca var. incrustata Forel, 1908 |
| Pheidole optiva Forel, 1901 |