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 365 million years ago

Mean atmospheric O2
 75% of modern level

Mean atmospheric CO2
 8x pre-industrial level

Mean temperature
 6C above modern level


Paleozoic Earth - A Late Devonian Ichthyostega underwater; Famennian stage; missing link; tetrapod; paleontology; paleobiology; paleobotany - Natural History Illustration Geologic Time Scale

 Era: Paleozoic
  Period: Devonian
   Epoch: Late
    Age: Famennian


Ichthyostega underwater

A Late Devonian tetrapod of the genus Ichthyostega submerged in a floodplain 365 million years ago in what is today the Canadian Arctic. The tree-like trunk immediately behind the Ichthyostega is the base of a Pleuromeia. The Ichthyostega is eyeing a drowned centipede.

Ichthyostega was one of the earliest tetrapods, a descendent of lobe-finned fishes and ancestor of amphibians. Ichthyostega had lungs and seven-toed limbs that allowed it to move about the shallow waters and shores of swamps and floodplains. It was among the first terrestrial vertebrates.



Copyright Walter B. Myers. All rights reserved.

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