The Famennian is one of two faunal stages in the Late Devonian epoch. It lasted from 374.5 ± 2.6 million years ago to 359.2 ± 2.5 million years ago. It was preceded by the Frasnian stage and followed by the Tournasian stage.
North American subdivisions of the Famennian include the Chautauquan, Canadaway, Conneaut, Conneautan, Conewango and Conewangan.
It was during this age that tetrapods first appeared. In the seas, a novel major group of ammonoid cephalopods called clymeniids appeared, underwent tremendous diversification and spread worldwide, then just as suddenly went extinct.
The beginning of the Famennian is marked by a major extinction event, and the end with a smaller but still quite severe extinction event.
- List of fossil sites (with link directory)
|Lower/Early Devonian||Middle Devonian||Upper/Late Devonian|
| Lochkovian | Pragian|
|Eifelian | Givetian||Frasnian | Famennian|