Sigilmassasaurus is a Spinosaur that has been though to be an Allosaur. The first picture is a Spinosaur, and the second is an Allosaur. It is most likely a Spinosaur, and that's why I classified it like this. It lived in Africa in the Middle Cretaceous around 112 million years ago. It was 25 feet long and weighed up to 2 tons. It was heavier for a Spinosaur, and probably was more of a hunter than even Spinosaurus himself. It had a shorter snout too, and likely a stronger bite force of 1000 lbs. It was 10 feet tall, and retained the long legs of Spinosaurs. Its remains where bombed in World War 2 , but we still have the original information to go off of for Sigilmassasaurus.