ceratosauridae is a family of theropod dinosaurs belonging to the infraorder ceratosauria. the family's type genus, "ceratosaurus", was first found in jurassic rocks from north america. ceratosauridae is made up of the genera "ceratosaurus", found in north america, tanzania, and portugal, and "genyodectes", from the early cretaceous of argentina. unnamed probable ceratosaurids are known from limited material in the middle jurassic of madagascar, the late jurassic of switzerland, and the late jurassic or possibly early cretaceous of uruguay.