67 million years ago. The southern New Jersey Hornerstown Formation is also known as the New Egypt Formation in central New Jersey. Studies suggest that the New Egypt Formation is a marine unit, and it is considered to be the deeper-water equivalent of the Tinton and Red Bank formations. This formation overlies the Navesink Formation, from which potential Dryptosaurus referred material has been reported. During the Maastrichtian stage the Western Interior Seaway, which stretched in a north–south direction from the present-day Arctic Ocean down to the Gulf of Mexico, separated Dryptosaurus and its coeval fauna from western North America which was dominated by tyrannosaurids. Although certainly a carnivore, the paucity of known Cretaceous East Coast dinosaurs make ascertaining the specific diet of Dryptosaurus difficult. Hadrosaurids are known from the same time and place as Dryptosaurus, the island continent of Appalachia, and they may have been a prominent part of its diet. Nodosaurs were also present, although less likely to be hunted due to their armor plating. When hunting, both the skull and hands were important for the capture and processing of prey. Cultural significance The 1897 watercolor painting (right) by Charles R. Knight titled Leaping Laelaps may represent the earliest depiction of theropods as highly active and dynamic. Knight's hand was guided by E. D. Cope, and reflects their progressive opinion about theropod agility despite their large size, as well as the opinion of Henry Fairfield Osborn, the curator of vertebrate paleontology at the American Museum of Natural History at the time of the painting's commission. The original painting is now preserved in the AMNH collections. By contrast, the typical illustrations of large carnivorous dinosaurs like Megalosaurus, in the late 1800s, depicted the animals as large, tail-dragging behemoths. See also Timeline of tyrannosaur research References - Cretaceous Dinosaurs of the Southeastern United States by David T. King Jr. External links [http://njfossils.net/meateating.html Dryptosaurus aquilunguis Tyrannosaurs Late Cretaceous dinosaurs of North America Maastrichtian life Fossil taxa described in 1877 Taxa named by Othniel Charles Marsh Paleontology in New Jersey Maastrichtian genus first appearances Maastrichtian genus extinctions