November 17, 2011
Pristine Reptile Fossil Holds New Information About Aquatic Adaptations
Extinct animals hide their secrets well, but an exceptionally well-preserved fossil of an aquatic reptile, with traces of soft tissue present, is providing scientists a new window into the behavior of these ancient swimmers.
According to the study published in PLoS ONE's November 16th issue, the fossil, characterized by a team led by Johan Lindgren of Lund University in Sweden, is from the mosasaur family, a group of reptiles that lived between 65 and 98 million years ago. The fossil was found in Western Kansas, and was submerged under a shallow sea at the time of the mosasaur's existence.
According to Dr. Lindgren, this study provides "unique insights into the biology of an extinct group of marine lizards that became adapted to aquatic environments in a fashion similar to that of the preceding ichthyosaurs ('fish-lizards') and succeeding whales." Thus, these results may have implications for understanding how this group ultimately transformed from land-dwellers to pelagic cruisers in a relatively short period of geological time.
On the Net: