Eotitanosuchus

Eotitanosuchus ("dawn giant crocodile") is an extinct genus of biarmosuchian therapsid whose fossils were found in the town of Ochyor in Perm Krai, Russia. It lived about 267 mya. The only species is Eotitanosuchus olsoni.

Description
Eotitanosuchus known from a single large skull without a lower jaw. Skull 35 cm, overall length may have been over 2.5 meters. Like Biarmosuchus tener, it was primitive in that, though it was a predator, the temple opening behind the eye was small, giving it a weak bite. The temple was, however, larger at the top than in the biarmosuchians.

Paleoecology
Eotitanosuchus fossils were found in the Perm (or Cis-Urals) region of Russia. Eotitanosuchus was without doubt a dominant animal of its environment. Found preserved in flood deposits (once coastal bogs) containing many skeletons of estemmenosuchids, it has been suggested that this large predator was an excellent swimmer, possibly semi-aquatic or frequenting marshy ground. This however is just speculation.