Megalosaurid

Palaeogeography

Megalosaurid remains have been found in various areas of the world throughout history. For example, Megalosauridae contains the most primitive theropod embryo ever found, from Early TithonianPortugal 152 million years ago (mya). In addition, various megalosaurid fossil discoveries have been dated to Bajocian-Callovian England and France 168 to 163 mya, Middle Jurassic Africa about 170 mya, Late Jurassic China 163 to 145 mya, and Tithonian North America about 150 mya. Most recently, megalosaurids have been found in the Tiourarén Formation in Niger, proving again that these basal tetanurans have experienced global radiation. Teeth from the Late Jurassic aged Tacuarembó Formation of Uruguay and the Tendaguru Formation of Tanzania indicate the presence of a large megalosaurine, likely Torvosaurus.