Datheosaurus

Datheosaurus is an extinct genus of caseasaur. It was at least 1.5 m in length. It lived during the Latest Carboniferous to Early Permian in Poland.

Discovery and history
It was originally described in 1905 on a basis of a specimen from late Carboniferous deposits in Poland. It was later considered a synonym of Haptodus by several authors, but subsequent examination has found it be a caseid rather a sphenacodont. This was confirmed by cladistic analysis, which recovered Datheosaurus as a basal caseid