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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
The anatomy of Pachycephalosaurus itself is poorly known, as only skull remains have been described. [10] Pachycephalosaurus is famous for having a large, bony dome on top of its skull, up to 25 cm (10 in) thick, which safely cushioned its brain. The dome's rear aspect was edged with bony knobs and short bony spikes projected upwards from the ...
Another skull (CM 3452) was found by Carnegie crews in 1915, bearing 6 articulated cervical vertebrae and mandibles, and another skull with mandibles (CM 1155) was found in 1923. All of the skulls found at Dinosaur National Monument were shipped back to Pittsburgh and described by William Jacob Holland in detail in 1924, who referred the ...
The skull had five pairs of fenestrae (skull openings), the largest of which was for the orbit (eye socket), [30] with the eyes being larger in proportion to the rest of the skull. The lower jaw was slender and had no mandibular fenestra, a hole in the side of the lower jawbone commonly seen in archosaurs .
Dippy is a composite Diplodocus skeleton in Pittsburgh's Carnegie Museum of Natural History, and the holotype of the species Diplodocus carnegii.It is considered the most famous single dinosaur skeleton in the world, due to the numerous plaster casts donated by Andrew Carnegie to several major museums around the world at the beginning of the 20th century.
Camarasaurus (/ ˌ k æ m ər ə ˈ s ɔː r ə s / KAM-ər-ə-SOR-əs) is a genus of sauropod dinosaur that lived in North America during the Late Jurassic period.Its fossil remains have been found in the Morrison Formation, dating to the Kimmeridgian and Tithonian ages of the Jurassic, between 155 and 145 million years ago (mya).
One of the first major fossil finds of the 20th century in Pennsylvania was the 1902 discovery of dinosaur tracks at a fisher's Quarry near Graterford in Montgomery County. [23] Another prominent early 1900s discovery was a lower jaw from the amphibian Calamops was discovered in the Late Triassic Stockton Formation at Holicong .
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".