|Named By:||Erik Jarvik in 1952|
|Time Period:||Late Devonian, 365 Ma|
|Size:||60 centimetres long|
|Fossil(s):||Initially only skull fragments, further fossils have been discovered making it one of the most completely preserved species. A very well preserved specimen was discovered in 1987 by Jennifer A. Clack|
|Classification:||| Chordata | Tetrapoda | Amphibia | Labyrinthodontia | Ichthyostegalia ||
Acanthostega (meaning "spiny roof") is an extinct genus of stem-tetrapod, among the first vertebrate animals to have recognizable limbs. It appeared in the late Devonian period (Famennian age) about 365 million years ago, and was anatomically intermediate between lobe-finned fishes and those that were fully capable of coming onto land.