Researchers excavated the oldest pterosaur ever discovered in North America and named it the “Ash Winged Dawn Goddess.”
The 209 million-year-old palace was one of more than 1,000 Triassic fossil caches extracted from rocks in Arizona’s petrified Forest National Park. Eotephradactylus McIntireae evolved near the beginning or dawn of the evolutionary history of Pterosaurs, and is partially named after the Greek goddesses, volcanic ash and EOS discovered in the fossil layers and EOS.
Unofficially called “Pterodactyls,” the Pterosaurs were flying reptiles that ruled the sky during the dinosaur era. This group produced many giants. Some have wingspans of about 36 feet (11 meters), but E. The mcintireae and other early members were smaller in comparison.
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“The pterosaur was the size of a small seagull and could have been sitting on your shoulder,” research from Ben Krigman, a paleontologist at the Smithsonian National Museum of Natural History in Washington, DC, told Live Science in an email.
E. McIntireae was one member of the lost ecosystem described in a study published in the PNAS Journal on Monday (7th July). Arizona’s fossil cache also contained giant amphibians, freshwater sharks, armored crocodile-like creatures, and one of the oldest known turtle fossils.
These findings help researchers understand animals living before the violent mass extinction events caused by volcanic eruptions.
Related: Giant pterosaurs are not good at flying, and they could even walk between dinosaurs
Towards the end of the Triassic, northeastern Arizona was located just above the equator in the middle of Pangaea, the supercontinent. At the time, the semi-arid landscape was marked with small rivers and flood-prone waterways, according to a statement released by the Smithsonian. Researchers suspect that the floods washed away small palaces and other animals that lived in the area at the time, burying their bodies in sediment and ashes.
A team of scientists first discovered what remains of Triassic bones in 2011. The fossils were almost small and delicate, so rather than trying to dig them out in the field, the team extracted large deposits and passed them in the lab. Many chunks went to the Smithsonian National Museum of Natural History, where volunteers carefully extracted the fossils for thousands of hours. A volunteer named Suzanne McIntire extracted a jaw belonging to Pterosaur in 2013.
Krigman said he began working on fossils in 2018 after the jaw was discovered, and initially suspected the fossil was a pterosaur. At the time, researchers only found early wing columns in North America, and were never found in sediments deposited in rivers.
“My doubts rested when I finally looked into my jaw. The distinctive teeth and jaw anatomy was definitely from the pterosaur,” Krigman said. “I was most surprised by the fact that such a delicate little jaw was not destroyed by the movement of the river gravel before it became fossilized.
Bonebed revealed a community of evolutionary newcomers such as pterosaurus and turtles, sharing the landscape with each other, and before that, ancient animals such as giant amphibians before the latter was extinct at the end of Trisic.
“The presence of pterosaur autephradactylus, living and interacting with communities alongside groups such as frogs, lizard parents, and turtles, was the first appearance of this community type in the fossil record. These groups generally did not precede the extension of the Eurasian and Cretaceous period. He said.
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