| Sigmodon mascotensis subsp. ischyrus Goodwin, 1956 |
| Sigmodon mascotensis subsp. mascotensis J. A. Allen, 1897 |
| Sigmodon minimus J. A. Allen, 1895 |
| Sigmodon minimus subsp. minimus J. A. Allen, 1895 |
| Sigmodon ochrognathus Bailey, 1902 |
| Sigmodon ochrognathus subsp. baileyi Bailey, 1902 |
| Sigmodon ochrognathus subsp. madrensis Goldman & Gardner, 1947 |
| Sigmodon ochrognathus subsp. montanus Benson, 1940 |
| Sigmodon ochrognathus subsp. ochrognathus Bailey, 1902 |
| Sigmodon planifrons E. W. Nelson & Goldman, 1933 |
| Sigmodon planifrons subsp. minor Goodwin, 1955 |
| Sigmodon planifrons subsp. planifrons E. W. Nelson & Goldman, 1933 |
| Sigmodon planifrons subsp. setzeri Goodwin, 1959 |
| Sigmodon toltecus (Saussure, 1860) |
| Sigmodon vulcani J. A. Allen, 1906 |
| Sigmodon zanjonensis Goodwin, 1932 |
| Sigmodontinae Wagner, 1843 |
| Sitomys Fitzinger, 1867 |
| Sitomys americanus subsp. arizonae J. A. Allen, 1894 |
| Sitomys americanus subsp. gambelli J. A. Allen, 1893 |