Naturalist Charles Pickering was the librarian and a curator of the Academy of Natural Sciences. In 1843, he traveled to Africa and India to research human races. In 1848, Pickering published Races of Man and Their Geographical Distribution, which enumerated eleven races.
It lived from 98 to 83 million years ago, separating itself from the Velociraptor by roughly 10 million years. You might say it's an ancestor of the actual Velociraptor, even though the original specie of raptor was almost the size of modern chicken and the Achillobator was roughly 1 ft taller than the average person.
How big are raptors? Answer Wiki. Raptors are actually a whole family of dinosaurs, known as the dromaeosaurs. All of these are modestly-sized dinosaurs with a sickle claw on the second toe, a stiffened, counter-balancing tail, arms that fold the same way bird wings do, and feathers. There are at least 35 species known to date. The smallest is Rahonavis (meaning death-from-the-clouds bird), which was about 2.5 feet long, and weighed around 15 pounds; the largest is Utahraptor, 23 feet in length and roughly 600 pounds. Velociraptor in particular got to about 6 feet in length and around 60 pounds.