Megaraptor, don't let its name fool you. It is an Allosaur, not a Dromeaosaur. It was called Megaraptor because of its 15 inch sickle claw that was thought to be on its foot. Later fossil evidence showed that the long claw was on its hand. It isn't known from much fossil evidence, but we have a pretty good picture of how big it was. It was around 26 feet long and 7 feet tall. It also weight around 1.7 tons. It lived in middle Cretaceous Argentina, and would have preyed on Sauropods. It probably hunted in packs so that it could it could hunt even some of the smaller sauropods of the area.