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Paleozoic Ordovician
Echinoderms( Starfish, Sand dollar, sea urchin and sea cucumbers). Invertebrates are dominant, mollusks become abundant. Earliest fish that are jawless and later, and jawed and armored fish -
Paleozoic Cambrian
Earliest Record of marine life - Trilobites are dominant -
Paleozoic Silurian
Earliest terrestrial pants and animals. Tiktaalik Eurypterids develope -
Mesozoic periods Trassic
Earliest Dinosaurs, abundant cycads and conifers -
Paleozoic Carboniferous
Abundant sharks and amphibians. Large swamps and coal forming forest. Earliest reptiles. Scales trees and seed ferms. -
Paleozoic Permian
Extinction of many types of marine animals including trilobites -
Mesozoic Jurassic
Earliest birds and mammals abundant dinosaurs and ammonites -
cenozoic Teritary
Earliest Placental mammals, modern mammals, large running mammals -
Cenozoic
Large Carnivores, Neanderthals, human, mastodons -
Mesozoic Cretaceous
Earliest flowering plants, climax of dinosaurs followed by their extinction . Great decline of brachiopods. Abundance of bony fish fish.