The Mustersan age is a period of geologic time (48.0–42.0 Ma) within the Eocene epoch of the Paleogene, used more specifically within the South American land mammal age (SALMA) classification. It follows the Casamayoran and precedes the Divisaderan age.[1] [2]
This age is named after Lake Musters in the Golfo San Jorge Basin.
| Formation | Country | Basin | class=unsortable | Notes |
|---|---|---|---|---|
| Sarmiento Formation | ||||
| Group | Fossils | Formation | class=unsortable | Notes |
|---|---|---|---|---|
| Mammals | Antepithecus brachystephanus, Guilielmoscottia plicifera, Kramadolops mayoi, Propyrotherium saxeum, Pseudhyrax eutrachytheroides, Eomorphippus sp. | |||
| Birds | Perudyptes devriesi | |||
| Reptiles &<br />amphibians | ||||
| Shelania laurenti | ||||
| Insects | ||||
| Agathis zamunerae, Atherospermophyllum guinazui, Embothrium precoccineum, ?Embothrium pregrandiflorum, Fagus subferruginea, Lomatia preferruginea, Retrophyllum spiralifolium, Blechnum sp. | ||||