Adam Khor wrote: »
Wonder what an adult Megaraptor looked like, tho...
Phuwiangvenator was probably a fast runner. With a length of about six meters, it was considerably smaller than the T. rex, who measured about twelve meters. Megaraptors have so far been discovered mainly in South America and Australia. "We have compared the Thai fossils with the finds there," says Samathi. "Various characteristics of Phuwiangvenator indicate that it is an early representative of this group. We take this as an indication that the megaraptors originated in Southeast Asia and then spread to other regions."
During his research in Thailand, the doctoral student discovered further unidentified fossils. They also belong to a predatory dinosaur, which was a bit smaller with a length of about 4.5 meters. The material was not sufficient to clarify the exact ancestry. However, scientists assume that smaller dinosaur, named Vayuraptor nongbualamphuenisis, is also related to Phuwiangvenator and T. rex. "Perhaps the situation can be compared with that of African big cats," explains Samathi. "If Phuwiangvenator were a lion, Vayuraptor would be a cheetah."
The bones cannot be definitively identified to a species, but closely resemble an Australovenator wintonensis specimen found less than 2 kilometres away in 2006.
Dr White said the dinosaurs could be up to 2 metres high, between 5 to 7 metres long, and were similar in appearance to the velociraptors depicted in the film Jurassic Park.
"Except the claws are on the hands, not the feet," he said.
"It had quite large hands, but on each hand it had two recurved claws that were quite large … and like birds you have a horny sheath over the top so they would have ended up round about close to 25 to 30 centimetres."
We have found a very large example of a new megaraptorid; these were formidable carnivorous dinosaurs, with spectacular hunting adaptations.
Unlike T. rex, megaraptors were more gracile animals, better suited for running, with long tails to keep balance and muscular legs, but elongated for a greater stride.
The main weapons of megaraptors were the arms which were very long and muscular and had scythe-like claws with a sharp edge, up to 40 cm long, so it's likely these animals (were using their claws to inflict deep wounds on their prey).