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Trilobites
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Brachiopods
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Ophuiroids
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Responsible for the extinction of 100 marine families. Before the extinction event, aquatic invertebrate were common such as trilobites and brachiopods.
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Dunkleosteus
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Tabulate Coral
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Nautilus
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70 % of all marine species. Species in shallow oceans were affected the most, with coral reefs completely disappearing for 100 million years.
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Sponges
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Rugose Coral
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Crinoids
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Considered most deadly mass exctinction. 90% of all life died off. Caused by volcanism that may have been activated by a comet/asteroid. Resulted in an increased in freely swimming organisms in the oceans, rather than being attached to the ocean floor.
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Ammonoids
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Phytosaurs
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Aetosaurs
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Caused by eruption of massive floods of lava which broke apart Pangea and formed Atlantic Ocean. Devastating for marine invertebrates, cleared way for larger reptiles such as dinosaurs.
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Caused by a several mile wide asteroid making impact with Earth's surface 18% of land vertebrate went extinct, including dinosaurs. Allowed for mammal takeover of the planet.
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Elasmosaurus
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Tyrannosaurus Rex and Ceratosaurus
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