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meaning: "Spiny roof"
Named By: Erik Jarvik in 1952
Time Period: Late Devonian, 365 Ma
Location: Eastern Greenland
Size: 60 centimetres long
Diet: unavailable
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.

Read more about Acanthostega at Wikipedia
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