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Cambrian 570-500 MYA
570-500 MYA -
Period: to
Paleozoic Era
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Ordovician 490-443 MYA
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Silurian 443-416 MYA
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Actinopterygii first appeared 420 MYA
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Sarcopterygii first appeared 418 MYA
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Divonian 416-359 MYA
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Sarcopterygii thrived 385-299 MYA
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Carboniferous 359-299 MYA
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Permian 299-251 MYA
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Triassic 251-199 MYA
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Jurassic 199-145 MYA
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Period: to
Mesozoic Era
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Crataceous 145-65 MYA
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Tertiary 65-23 MYA
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Period: to
Cenozoic Era
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Quaternary 1.8 MYA