Sentences with phrase «tetrapod footprints»

Tetrapod footprints and skeletal material from more than 70 localities in eastern North America indicate that large theropod dinosaurs appeared less than 10,000 years after the Triassic - Jurassic boundary and less than 30,000 years after the last Triassic taxa, in synch with a terrestrial mass extinction.

Tetrapod footprints dating back 397 million years have been discovered in the Świętokrzyskie mountains in southern Poland in what was, at the time they were made, a seashore.

Not exact matches

Together, the evidence suggests Ossinodus must have spent some time on land, making it the oldest known tetrapod to be adapted to land life — although earlier footprints exist.

«Our discovery suggests that the current scientific consensus is mistaken not only about when the first tetrapods evolved, but also about where they evolved,» says Grzegorz Niedźwiedzki of the Department of Palaeobiology and Evolution at the University of Warsaw in Poland, who discovered the footprints in 2002 in an old quarry near the town of Kielce.

The footprints are 18 million years older than the earliest known examples of fossilised tetrapod bones.