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Fossil skull from eons ago is discovered
WASHINGTON: Scientists have unearthed a skull of the most primitive four-legged creature in the earth’s history, which should help them better understand the evolution of fish to advanced animals that walk on land.
The 365-million-year-old fossil skull, shoulders and part of the pelvis of the water-dweller, Ventastega curonica, were found in Latvia, researchers report in a study being published in Thursday’s issue of Nature.
Even though Ventastega is likely an evolutionary dead-end, the finding sheds details on the evolutionary transition from fish to tetrapods. Tetrapods are animals with four limbs and include such descendants as amphibians, birds and mammals.
The team did not find the legs or toes of Ventastega, but was able to deduce that it was four-limbed because key parts of its pelvis and its shoulders were found. From their shapes, scientists were able to conclude that limbs, not fins, were attached to Ventastega. — AP
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