| Sciurinae Fischer von Waldheim, 1817 |
| Sciurini Fischer von Waldheim, 1817 |
| Sciuropterus Cuvier, 1825 |
| Sciuropterus volans Linnaeus, 1758 |
| Sciuropterus volans subsp. goldmani E. W. Nelson, 1904 |
| Sciurus Linnaeus, 1758 |
| Sciurus aberti Woodhouse, 1853 |
| Sciurus aberti subsp. barberi J. A. Allen, 1904 |
| Sciurus aberti subsp. durangi Thomas, 1893 |
| Sciurus aberti subsp. phaeurus J. A. Allen, 1904 |
| Sciurus affinis Alston, 1878 |
| Sciurus albipes Wagner, 1837 |
| Sciurus albipes subsp. colimensis E. W. Nelson, 1898 |
| Sciurus albipes subsp. effugius E. W. Nelson, 1898 |
| Sciurus albipes subsp. hernandezi E. W. Nelson, 1898 |
| Sciurus albipes subsp. nemoralis E. W. Nelson, 1898 |
| Sciurus albipes subsp. quercinus E. W. Nelson, 1898 |
| Sciurus alleni E. W. Nelson, 1898 |
| Sciurus apache J. A. Allen, 1893 |
| Sciurus arizonensis Coues, 1867 |