Acanthostega

Acanthostega Temporal range: Devonian 365 mya
Acanthostega gunnari skeleton reconstruction
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Subphylum:	Vertebrata
Superclass:	Osteichthyes
Class:	Sarcopterygii
Binomial name
Acanthostega gunnari Jarvik, 1952
Tetrapodomorpha
Tetrapodomorpha – Tetrapods

Acanthostega (meaning 'spiny roof') was an extinct fishapod. It was one of the first vertebrates to have recognizable limbs. It appeared in the Upper Devonian about 365 million years ago, and was anatomically intermediate between lobe-finned fishes and the first tetrapods fully capable of coming onto land.^[1]

1. ↑ Jennifer Clack, Scientific American, Getting a leg up on land Archived 2007-10-18 at the Wayback Machine November 2005.