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earliest abundant record of marine life trilobites dominant
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*Earliest fishes
*Invertabrates dominant
*coelenterates and mollusk become abundant
*Echinoderms expand in numbers and kinds -
*Earliest terrestrial plants and animals
*Peak devlopment of eurypterids -
Earliest amphibians and ammonites
*extinction of armored fishes, many fishes are abundant -
*Earliest reptiles
*Great cole-forming forest
*Abundant sharks and amphibians
*Large and numerous scale trees and seed ferns -
*Extinction of many kinds of marine animals, including trilobites
*Little change in terrestrial animals -
*Earliest dinosuars
*Abundant cycedes and conifers -
*Earliest birds and mammals
*Abundant dinosuars and ammonites -
*Earliest flowering plants
*Climax of dinosuars and ammonites - followed by extinction
*Great decline of brachiopods
*Great devolpment of bony fishes -
*Humans, mastodons, mammoths and large carnivores
*abundant grazing animals
*Large running mammals
*Many modern types of mammals
*Earliest placental mammals
