| Name | From | To | Age range |
|---|---|---|---|
| Corylus californica | Paleogene | Neogene |
|
| Corylus bifurcata | Late Oligocene | Late Oligocene |
|
| Corylus avellana | Early Tertiary | Holocene |
|
| Corylus americana | Early Tertiary | Late Pliocene |
|
| Corylus | Early Triassic | Quaternary |
|