| Citellus tereticaudus subsp. neglectus (Merriam, 1889) |
| Citellus tereticaudus subsp. tereticaudus (Baird, 1858) |
| Citellus tereticaudus subsp. vociferans Huey, 1926 |
| Citellus variegatus Erxleben, 1777 |
| Citellus variegatus subsp. atricapillus (Bryant, 1889) |
| Citellus variegatus subsp. couchii (Baird, 1855) |
| Citellus variegatus subsp. grammurus (Say, 1823) |
| Citellus variegatus subsp. juglans Bailey, 1913 |
| Citellus variegatus subsp. rupestris (J. A. Allen, 1903) |
| Citellus variegatus subsp. variegatus Erxleben, 1777 |
| Cynomys Rafinesque, 1817 |
| Cynomys ludovicianus (Ord, 1815) |
| Cynomys ludovicianus subsp. arizonensis Mearns, 1890 |
| Cynomys mexicanus Merriam, 1892 |
| Eutamias Trouessart, 1880 |
| Eutamias bulleri J. A. Allen, 1889 |
| Eutamias bulleri subsp. solivagus A. H. Howell, 1922 |
| Eutamias dorsalis (Baird, 1855) |
| Eutamias durangae J. A. Allen, 1903 |
| Eutamias merriami J. A. Allen, 1889 |