Paleolithic Era Research Paper

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Paleozoic Era
The Houston Museum of Natural Science features Trilobites from the Middle Devonian, which were found in Silica Shale in Lucas County of Ohio. This particular genus of trilobites, “Eldredgeops milleri,” have large eyes containing a separately set lenses without a common cornea. Its thorax has 11 segments. Trilobites are some of the earliest known arthropods. Since these particular trilobites had good vision, I imagine that they were one of the few genus of trilobites that were either predators or scavengers. They were benthic bottom ocean filter feeders.

Mesozoic Era
The Houston Museum of Natural Science features a Crinoid from the Jurassic period, which was found in the Holzmaden Black Shale Formation in Holzmaden, Germany. Although Crinoids are popularly known as “sea lilies” for their flowering stems, they are are not plants. They are related to starfish, but are on a stem, with the flower head actually being the animal's body. They were common on the shallow tropical sea bottoms of the Paleozoic and belong to the phylum Echinodermata. It ate microscopic plankton filtered from the sea water and had a gut, muscles, nerves, a reproductive system and
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It grew to be as large as a grizzly bear, and formerly textbooks called it the carnivorous Terror Bird. However, Diatryma is a herbivore, eating berries, nuts, and the sap of branches. Ridges on its beak could crush vegetables. It's more akin to a giant goose than a terror bird. The evidence for it being a herbivore include the fact that both the top and bottom of its beak are large and deep. In comparison, living predatory birds like hawks and eagles today don't have beaks like this but rather a hooked snout for harpooning and tearing their prey. Predatory birds also have thin lower jaws because the hook does most the work, but Diatryma has a strong and thick lower beak. It also has blunt, weak claws on its feet unlike predatory
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