Antarctic crocamander

An enormous amphibian that lived 240 million years ago in Antarctica could really sink its teeth -- all three rows of them -- into prey, considering it had an extra set of large, sharp teeth on the roof of its mouth.

Its tooth-packed mouth, 2.75-foot-long head and 15-foot body help to explain how this beast, Kryostega collinsoni, was Antarctica's top known Triassic predator.

The animal resembled a modern crocodile but was actually a temnospondyl, a prehistoric amphibian that was an early relative of salamanders and frogs.

Posted by David on September 12, 2008 1:36 PM