Diplocaulus, amphibian skull Gallimimus Unlike most modern birds Confuciusornis

Unlike most modern birds Confuciusornis retained clawed fingers on its wings

The tail and posterior part of the trunk had no armor

along the neck and tail that may have formed a thick

Most ammonites are homomorph

Diplocaulus, amphibian skull Gallimimus Unlike most modern birds ConfuciusornisDiplocaulus was an early amphibian distinguished by a boomerang shaped head formed by two elongated bones at the back of the skull. This odd shape may have been used as a hydrofoil allowing it to swim against the current. It also would have made it difficult for predators to swallow. Diplocaulus was a tetrapod, an amphibian, a labyrinthodont, a lepospondyl, and a nectridian. Specs: Diplocaulus sp. Late Carboniferous to late Permian (270 m. y. a.).