Teratosaurus (Gr. teras "monster" sauros "lizard") was a genus of rauisuchian known from the Triassic Stubensandstein (Löwenstein Formation - Norian age) of Germany and from the Krasiejów (Silesia region) of Poland. The type specimen was described by Von Meyer on the basis of a left maxilla (upper jaw bone) with large teeth, which he declared to be distinct from Belodon.