Researchers from the School of Medicine at Johns Hopkins University using fossil hunter identified and described a fossil dinosaur recently hatched from an egg. It is the youngest ever found nodozavr scientists, and founder of a new genus and species of animals that lived about 110 million years ago in the Early Cretaceous Period.
Fossil nodozavrov were found in various locations around the country, but they are rarely seen in the United States. The information was published in the September issue of "Journal of Paleontology". "Now we can learn about the development of limbs and the development of skulls for life dinosaur" - said David Vishampel (David Weishampel), professor of anatomy at the School of Medicine at Johns Hopkins University. "Very small size of the animal also points to the location of the nest or nearby rookery, since it could not go far from the place where the eggs came from. We now have the opportunity to learn about the reproductive biology of dinosaurs and the lives of Maryland dinosaurs in general."
The fossil was discovered in 1997 by Ray Stanford (Ray Stanford), dinosaur hunter, who often spent time looking for fossils near his home, but this time he was looking for the bayou after heavy flooding.
Stanford identified fossils and dinosaur called Uishampela, paleontologist and expert on dinosaurs. Next Uishampel and his colleagues confirmed that it was a fossil nodozavra, recognizing the distinct patterns of studs and grooves on the skull. They then performed a computer analysis of the skull shape, comparing its proportions with ten skulls of other species, ankylosaurs group, which includes nodozavry.
They found that this dinosaur was related to one kind of nodozavra, though it’s snout was shorter than the other. Comparative measurements enabled them to identify new species, marylandicus Propanoplosaurus. Also, what is the youngest dinosaur ever discovered by scientists, it is also the first that appeared out of dinosaur eggs ever found in the eastern United States, as reported Uishampel.
The area was originally findings floodplain, where as told Uishampel, dinosaur and possibly drowned. After cleaning the fossil before researchers appeared nodozavr, lying on his back, a skull and a large part of the body is imprinted on the ground. Uishampel determined the age of the dinosaur at the time of death by analyzing the degree of development and the ability to articulate the ends of the bones, as well as finding the porosity of bone, which is typical for young animals.
Size nodozavra was also deciphering: the body of a small fossil, is only 13 cm in length. Nodozavra adult size as suggested researchers root was 20-30 feet in length. Uishampel also took into account the location and quality of the fossil to calculate the cause of death of a dinosaur and the preservation of its remains. The egg shell was not found stored in the vicinity, and the shape of the bones and the size of small traces nodozavra identified in the neighborhood, a paleontologist forced to believe that the dinosaur recently hatched from an egg, and the embryo was not because he could not walk on their own.
"We did not have any information at all about rushing nodozavrah before this discovery," - said Uishampel. "And it was certainly enough motivation for further searches dinosaur fossils in Maryland."
Stanford rushing nodozavra donated to the National Museum of Natural History, Smithsonian, where it is now available for everyone, as well as for research.
Original: Physorg Translation: M. Potter