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One of the earliest notable events in Pennsylvania paleontology was the October 5th, 1787 presentation by Caspar Wistar and Timothy Matlack of a probable dinosaur metatarsal discovered in Late Cretaceous rocks near Woodbury Creek in New Jersey as "'a large thigh bone'" to the American Philosophical Society in Philadelphia. [19]
Fossil (right) of the Early Jurassic dinosaur footprint ichnogenus Anomoepus †Anomoepus †Anomoepus gracillimus †Apatopus †Atreipus †Atreipus milfordensis †Batrachopus †Batrachopus gracilis †Belodon †Belodon priscus †Brachychirotherium †Brontozoum †Brontozoum sillimanium †Calamops – type locality for genus
Skulls of the three species compared: P. perotorum (with inaccurate epiparietal placement), P. canadensis, and P. lakustai Pachyrhinosaurus canadensis, was described in 1950 by Charles Mortram Sternberg based on the holotype incomplete skull NMC 8867, and the paratype incomplete skull NMC 8866, which included the anterior part of the skull but was lacking the right lower mandible, and the "beak".
The dinosaur lived 150 million years ago in the late Jurassic period, making it millions of years older than the terrifying Tyrannosaurus rex that roamed the Earth some 66 million to 68 million ...
Researchers have uncovered a "dinosaur highway" after hundreds of giant prehistoric footprints dating back 166 million years were found in an English quarry. Discovered at the Dewars Farm Quarry ...
Remains of 3,500-year-old Egyptian woman reveal she suffered from ‘rare’ disease. Dinosaur skull found in New Mexico is a cousin of T. rex — and even bigger, experts say.
The shape and proportions of the skull changed significantly during growth. The rear of the skull and the orbits decreased in size, whereas the snout became relatively longer; similar changes occur in modern crocodiles. The skull was also proportionally larger in the younger specimens, and the sloping of the snout's upper profile was less distinct.
The university said in one area of the quarry, the tracks of the carnivore and herbivore dinosaurs crossed paths, leaving researchers to wonder how and if the two dinosaur species may have interacted.