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earliest record of marine life
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invertebrates are dominant, mollusks become abundant
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earlest terrestrial plants and animals
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armored fish go extinct, but abundance of several species of fish.
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earliest reptiles.
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Extinctin of many types of marine animals including trilobites
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earliest dinosaurs, abundant cycads and conifers.
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earliest birds and mammals abundant dinosaurs and ammonites.
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earliest flowering plants, climax of dinosaurs followed by their extinction.
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