Acanthostega

__ Acanthostega __


 * extinct tetropod genus
 * had 8 digits on each hand and foot linked by webbing
 * fish-like shoulder and forelimb
 * had lungs,but its ribs were to short to give support to its chest cavity out of water
 * its gills were internal and covered like those in fish
 * probably lived in shallow,weed choked swamps
 * had a lot of small teeth in the outer row,and two large fangs and some small teeth in the inner row
 * lived in late Devonian period