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Earliest record of marine life with Trilobites being the dominant species.
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Earliest fishes with invertebrates dominating Earth. Colentrates and mollusks become abundant and echinoderms expand in numbers and kinds.
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Early terrestrial plants and animals peak in developement.
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Earliest amphibians and ammonites. Armored fish become extinct.
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Earliest reptiles and coal-forming forests. Abundant sharks and amphibians. Large and numerous scale trees and seed ferns.
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Extinction of many species of marine animals including trilobites.
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Earliest dinosaurs, along with an abundance of cycades and conifers.
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Earliest birds and mammals. Abundance of dinosaurs and ammonites.
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Developement of flowering plants and climax of dinosaurs and ammonites which were soon after extinct. Decline of brachipods and developement of bony fishes.
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Earliest placemental mammals with many species similar to those in modern times. Humans, mastadons, mammoths, and large carnivors.
