 All of this led Mantell to publish an influential paper in 1831 entitled "The Age of Reptiles" in which he summarized the evidence for there having been an extended time during which the earth had teemed with large reptiles, and he divided that era, based in what rock strata different types of reptiles first appeared, into three intervals that anticipated the modern periods of the Triassic, Jurassic, and Cretaceous.In 1832 Mantell would find, in Tilgate, a partial skeleton of an armored reptile he would call "Hylaeosaurus".In 1841 the English anatomist Richard Owen would create a new order of reptiles, which he called Dinosauria, for "Megalosaurus", "Iguanodon", and "Hylaeosaurus".