| Scientific name | Authorship | Rank | Status | Images | |
|---|---|---|---|---|---|
| Oraesia wintgensi | (Strand, 1909) | species | Accepted | ||
| Orana delicata | Griveaud, 1977 | species | Accepted | ||
| Orana grammodes | (Hering, 1926) | species | Accepted | ||
| Orana palea | Griveaud, 1977 | species | Accepted | ||
| Orbamia abiyi | Hausmann & Tujuba, 2020 | species | Accepted | ||
| Orbamia balensis | Hausmann & Tujuba, 2020 | species | Accepted | ||
| Orbamia becki | Hausmann, 2006 | species | Accepted | ||
| Orbamia clarior | Hausmann & Tujuba, 2020 | species | Accepted | ||
| Orbamia clarissima | Hausmann & Tujuba, 2020 | species | Accepted | ||
| Orbamia emanai | Hausmann & Tujuba, 2020 | species | Accepted | ||
| Orbamia emanai emanai | Hausmann & Tujuba, 2020 | subspecies | Accepted | ||
| Orbamia emanai lenzi | Hausmann & Tujuba, 2020 | subspecies | Accepted | ||
| Orbamia marginata | Hausmann & Tujuba, 2020 | species | Accepted | ||
| Orbamia obliqua | Hausmann & Tujuba, 2020 | species | Accepted | ||
| Orbamia obliqua obliqua | Hausmann & Tujuba, 2020 | subspecies | Accepted | ||
| Orbamia obliqua parva | Hausmann & Tujuba, 2020 | subspecies | Accepted | ||
| Orbamia ocellata | (Warren, 1897) | species | Accepted | ||
| Orbamia octomaculata | (Wallengren, 1872) | species | Accepted | ||
| Orbamia pauperata | Herbulot, 1966 | species | Accepted | ||
| Orbamia renimacula | (Prout L. B., 1926) | species | Accepted | ||
| Oreadilema othreis | Krüger, 2015 | species | Accepted | ||
| Oreocerura dissodectes | (Kiriakoff, 1958) | species | Accepted | ||
| Oreoceryx aenea | Kiriakoff, 1953 | species | Accepted | ||
| Oreocossus cilimanjarensis | (Hampson, 1909) | species | Misapplied | ||
| Oreocossus grzimeki | Yakovlev, 2011 | species | Accepted |