Orthogoniosaurus (meaning "straight angled lizard", referring to the straight posterior edge of its type tooth) was a genus of theropod dinosaur from the late Maastrichtian-age Upper Cretaceous Lameta Formation of Jabalpur, India. It is based on one small, fragmentary tooth (preserved section 27 mm [1.1 in] long).Because it is the earliest published name for a Lameta theropod, it has sometimes been used as a synonym for other contemporaneous theropods, such as Indosaurus and Indosuchus.