Diplocaulus, amphibian skull Gallimimus Most estimates of megalodon's size

Most estimates of megalodon's size extrapolate from teeth

Most ammonites are homomorph

Unlike most modern birds Confuciusornis retained clawed fingers on its wings

Hauff had originally found the skeleton without the skull

The tail and posterior part of the trunk had no armor

Diplocaulus, amphibian skull Gallimimus Most estimates of megalodon's sizeDiplocaulus 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.).