Transcript Evolutionary Path from Fish to Humans

Evolutionary Path from Fish to Humans
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Ordovician
Cambrian
PreЄ
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S
D
C
Mammals ~ 225 mya
Reptiles ~ 312 mya
Tetrapodomorpha ~ 409 mya
Ray & Lobe FinBony Fish > 420 mya
Jawed Vertebrates~ 460 mya
1st Vertebrates
~ 425 mya
Vertebrate
Precursors
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Pg N
Evolutionary Path from Fish to Humans
N
1st Vertebrates
125 mya
Vertebrate
Precursors
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Ordovician
Cambrian
Geologic Time Periods Color Coded
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Haydean
Archean
Proterozoic
Cambrian
Ordovician
Silurian
Devonian
Carboniferous
Permian
Triassic
Jurassic
Cretaceous
Paleocene
Neogene
Quaternary
Haydean
Archean
Proterozoic
Cambrian
Ordovician
Silurian
Devonian
Carboniferous
Permian
Triassic
Jurassic
Cretaceous
Paleocene
Neogene
Quaternary
4567 – 3600 mya
3600 – 2500 mya
2500 – 541 mya
541 – 485 mya
485 – 443 mya
443 – 419 mya
419 – 359 mya
359 – 298 mya
298 – 252 mya
252 – 201 mya
201 - 145
145 - 66
66 - 23
23 – 2.6
2.6 - present
Haydean
Archean
Proterozoic
Cambrian
Ordovician
Silurian
Devonian
Carboniferous
Permian
Triassic
Jurassic
Cretaceous
Paleocene
Neogene
Quaternary
4567 – 3600 mya
3600 – 2500 mya
2500 – 541 mya
541 – 485 mya
485 – 443 mya
443 – 419 mya
419 – 359 mya
359 – 298 mya
298 – 252 mya
252 – 201 mya
201 - 145
145 - 66
66 - 23
23 – 2.6
2.6 - present
Ordovician
Haeckel's Paleontological Tree of Vertebrates (circA 1879)
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The evolutionary history of species has been described as a "tree", with
many branches arising from a single trunk. While Haeckel's tree is
somewhat outdated, it illustrates clearly the principles that more complex
modern reconstructions can obscure.