Restoration of  Tungsenia paradoxa

Digital restorations of endocasts of Tungsenia paradoxa

Photo of endocasts and digital restorations of endocasts and endocranial cavity

Tungsenia paradoxa, the earliest known stem-tetrapod from the Lower Devonian (Pragian, ~409 million years ago) of China, extends the earliest record of tetrapods by some 10 million years.