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Cambrian period, beggining of pelozoic, first time multicellulas life forms flourished on Earth.
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Echinoderms ( starfish, sand dollar, sea urchin and sea cucumbers.) Invertebrates are dominant, mollusks becom abundant. Earliest fish are jawless and later, jawed and armored fish.
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Earliest terrestrial plants and animals. Tiktalik Eurypterids develop.
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Armored fish go extinct, but abundance of several species of fish. Earliest amphibians and ammonites.
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Abundant sharks and amphibians, Large swamps and coal forming forests. Earliest reptiles. Scale trees and seed ferns.
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Extinction 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. Great decline of branchiopads. Abundance of bony fish.
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Earliest placental mammals, modern mammals, large running mammals.
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Large Carnivores, Neanderthals, Humans, Mastodons.
