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The major geological events  of the palaeozoic era include.......6 epochs that is  permian ,carboniferous ,devonian ,silurian ,ordovician & cambrian..In this era developed ....Mammal like reptiles ,First reptiles,First amphibians, First fishes,Jawless vertebrates and Dominanace of trilobites (arthropods) respectively in each epoch...........these are the events related to fauna at that time ........
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