A large carnivorous dinosaur the size of a bus that slashed its prey to death has been recognized as a new species 30 years after its remains were dug up in Utah. Allosaurus jimmadseni

The remains of the meat-eating Allosaurus jimmadseni uncovered by scientists in 1990. Which roamed the North American flood plains 155 million years ago.

A study of the bones of A. jimmadseni has been published in the famous journal PeerJ. It took seven years of hardworking to prepare the bones of this giant for analysis.

The 4,000-pound beast reached lengths of up to 29 feet and, much like the Tyrannosaurs rex, it ran on two legs.

However, according to recent studies, remains of these revealed that A.jimmadseni’s longer arms would have made it an even better hunter than the notoriously blood-thirsty T. rex.

‘Recognising a new species of dinosaur in rocks that have been intensely investigated for over 150 years is an outstanding experience of discovery,’ said Dr Daniel Chure, a retired palaeontologist at the Dinosaur National Monument in north-eastern Utah and co-lead author on the study.

A.jimmadseni and T. rex have a different skeletal structure, that is why it has been described as, an entirely new species.

According to Professor Mark Loewen(co lead author), of the Natural History Museum of Utah ‘The skull of Allosaurus jimmadseni is more lightly built than its later relative Allosaurus fragilis, suggesting a different feeding behaviour between the two,’.

However, the new dinosaur’s head was flatter and weaker than A. fragilis, and it had worse eyesight, with a narrower field of vision which suggests that it had more difficulty in catching its prey.