| Odontogracilis cracentis (Chemsak & Noguera, 1997) |
| Odontogracilis exilis (Fisher, 1947) |
| Odontomelitta Clarke, 2016 |
| Odontomelitta postimelina (Giesbert, 1996) |
| Oedopeza Audinet-Serville, 1835 |
| Oedopeza guttigera Bates, 1864 |
| Oedopeza ocellator (Fabricius, 1801) |
| Oedudes Thomson, 1868 |
| Oedudes callizona (Bates, 1881) |
| Oedudes spectabilis (Drury, 1782) |
| Oeme Newman, 1840 |
| Oeme costata LeConte, 1873 |
| Oeme costata subsp. costata LeConte, 1873 |
| Oeme rigida (Say, 1827) |
| Oeme rigida subsp. rigida (Say, 1827) |
| Oemina Lacordaire, 1868 |
| Oemini Lacordaire, 1868 |
| Olenosus Bates, 1872 |
| Olenosus serrimanus Bates, 1872 |
| Ommata White, 1855 |