Ceratopsians and pachycephalosaurs essay

True Bacterial infection from bites and scratches may have been lethal to dinosaurs. True Three-dimensional vision occurs because each eye sees an object at a slightly different angle, therefore, projecting a slightly different image on the retina. True In rare cases, internal organs may be represented as fossil molds or casts, even more rarely they are mineralized.

Ornithischians were classified as having a hip structure similar to that of birds, although they are not the descendants of birds. Marginocephalians, meaning "fringed heads" are a group of Ornithischians that have a distinctive skull structure, consisting of a slight shelf or bony frill on the back of the skull, a unique palate, and a short hip structure.

These herbivores include two major groups: These plant-eaters include the Ceratopsians, horned dinosaurs such as the Triceratops, Styrachosaurus, Pentaceratops, and the Protoceratops.

Pachycephalosaurians, thick-skulled dinosaurs like such as the Stegoceras and the Pachycephalosaurus. Ceratopsians processed a saddle-shaped boney frill that extended from the skull to the neck and typically had horns over the nose and eyes.

The most popular was the triceratops, which could reach over 26 feet and weigh in excess of twelve metric tons. Their frills served as two major functions.

It protected the vulnerable neck from being harmed. The second major function that the frill provided was due to the fact that the frill contained a network of blood vessels on its underside, which were used as a means to get rid of excess heat.

The Pachycephalosaurs were considered to be bipedal. They were also found to have thick skulls, flattened bodies, and tail that were covered in an array of body rods.

Pachycephalosaurs were thought to have been more than fifteen feet long and processed a skull that was surrounded by a rounded dome of solid bone. It was thought that they used their heads in combat or mating contests, but that was disproved fairly recently, which I will discuss later in the paper.

Both Ceratopsians and Pachycephalosaurs were "bird-hipped" and both of these suborders contained a backwards pubic bone. Both were Marginocephilia, or "fringed heads", which is one of three clads under the Orinthiscia order.

They were also herbivore dinosaurs that inherited their fringe at the back of the skull from earlier ancestors. The Pachycephalosaurs were of the kingdom animalia; the phylum chordate, the class Archosauria, the subclass Orintodira, and the order Orinthiscia.

The Ceratopsians were of the kingdom Animalia, the phylum Chordate, the class Archosauria, the order Rinthiscia, and the suborder Ceratopia.

The Ceratopsians are broken down into three different families: The most primitive group is the Psittacosauridae. There is only one member in this family and that is the Psittacosaurus, found in the lower cretaceous on the continent of Asia. It is considered to be a smaller form of the Ceratopsian, measuring around two meters in length.

Psittacosaurus contain possess only an overhanging shelf, as apposed to the larger and more advanced Ceratopsians that possess and actual frill.

There is a major difference found in the teeth of the Psittacosaurus from the earlier and more primitive Ornithischians in that "the enamel is thicker on one side of each tooth. This thickening provides the dinosaur with a "self-sharpening" edge that assists with the ability to chew threw vegetation in a more efficient way.

However, the hand is broad and could have supported a portion of the body weight.Ceratopsians and Pachycephalosaurs are closely related in their characteristics.

Ceratopsians processed a saddle-shaped boney frill that extended from the skull to the neck and typically had horns over the nose and eyes.

The most popular was the triceratops, which could reach over 26 feet and weigh in excess of twelve metric tons. Young Goodman Brown: The Downfall of Young Goodman Brown "Young Goodman Brown", by Nathaniel Hawthorne, is a story that is thick with allegory."Young Goodman Brown" is a moral story which is told through the perversion of a religious regardbouddhiste.com "Young Goodman Brown", Goodman Brown is a Puritan minister who lets his excessive pride in himself interfere with his relations with the community .

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STUDY. PLAY. Principle of Priority. preference given to the first dinosaur name proposed. Pachycephalosaurs and Ceratopsians linked under this family. Compsognathus. Essay Topics. 21 terms. Pachycephalosaurs: one evolutionary novelty. Thickened skull roof.

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Ceratopsians and Pachycephalosaurs This Research Paper Ceratopsians and Pachycephalosaurs and other 64,+ term papers, college essay examples and free essays are available now on regardbouddhiste.com Autor: review • November 10, • Research Paper • 2, Words (9 Pages) • Views4/4(1).