Cyclotosaurus

Cyclotosaurus is an extinct  genus of  temnospondyl within the  family  Mastodonsauridae. It was of great size for an amphibian, reaching 3–4.3 m (9–14 ft) in length with an elongated 70 cm (28 in) skull. [1] [2]  The name means "round eared lizard" in  Ancient Greek, derived from round openings or fenestrae in the cheeks, which are thought to contain structures of the middle ear.