The Casamayoran age is a period of geologic time (54.0—48.0 Ma) within the Eocene epoch of the Paleogene used more specifically with South American Land Mammal Ages. It follows the Riochican and precedes the Mustersan age.[1]
| Paleogene Period | ||
|---|---|---|
| Paleocene Epoch | Eocene Epoch | Oligocene Epoch |
| Danian | Selandian Thanetian |
Ypresian | Lutetian Bartonian | Priabonian |
Rupelian | Chattian |