Type species: Eschara rhombea von Hagenow, 1851
This genus includes the species:
| Onychocellaria caecilia | (d'Orbigny, 1851) | Cretaceous Maastrichtian | France |
| Onychocellaria calypso | (d'Orbigny, 1851) | Cretaceous Maastrichtian | France |
| Onychocellaria rhombea | (von Hagenow, 1851) | Cretaceous Maastrichtian | Netherlands, Belgium, France |