Newly discovered Pterosaur Species Rewrites Early ⁤Evolutionary History

A newly discovered species of pterosaur, named Eotephradactylus mcintireae, is ⁢challenging what scientists thought they knew about the early evolution of these⁢ flying reptiles. The remarkably well-preserved fossils, unearthed in New Mexico, represent one of the oldest pterosaurs found in ‍North America and offer a rare glimpse into ‍a Triassic‍ Period ecosystem. The discovery pushes⁢ back the timeline for the co-existence of‍ pterosaurs with other key animal groups, including‍ early turtles and amphibians.

A Volunteer’s Discovery Leads to a New Species

The story of Eotephradactylus mcintireae ⁤began with painstaking⁢ work at a‍ fossil-rich site in New Mexico. Fragments of bone, encased in rock, were transported to the Smithsonian National Museum of Natural History,⁤ where a dedicated team of volunteers began the ⁢arduous process of extraction.

It was volunteer Suzanne McIntire who, in 2013, carefully freed a jawbone that would prove to‍ be pivotal. This jaw, exhibiting unique characteristics, ultimately led to the identification of a new pterosaur species – and the honor of having the species name, mcintireae, bestowed in her recognition.

!The fossils ⁢were preserved in a remote rock outcrop called ⁢the Owl rock Member, which is part of the upper Chinle Formation.

(Image credit: Ben kligman, Smithsonian.)

Challenging Assumptions About⁣ Pterosaur Origins

The ⁣fossils were recovered⁣ from the Owl Rock Member, a remote rock outcrop within the upper Chinle⁣ formation. Initially, researchers were skeptical. Prior ⁤to this find, only one early pterosaur had been discovered in North America, and the prevailing understanding was⁣ that early pterosaurs didn’t inhabit river environments.

“When I finally examined the jaw my doubts were put to rest – the distinctive teeth and jaw anatomy was unmistakably from a pterosaur,” explained Ben Kligman, the researcher who began studying the fossils in 2018. “I was most surprised by the fact that a delicate, tiny jaw like this one had not ⁤been ⁤destroyed by the movement of river gravel prior to it being fossilized,‍ suggesting that ⁤the‍ bonebed was preserving a unique fossilization setting.”

The⁣ preservation of such delicate bones within a river deposit is itself a significant finding, indicating specific conditions that allowed for remarkable fossilization. This bonebed isn’t just revealing a new species; it’s offering insights into a previously unknown paleoenvironment.

A Snapshot ⁣of a Triassic Ecosystem

The discovery of Eotephradactylus mcintireae isn’t isolated. The bonebed has yielded fossils of other creatures that lived alongside the pterosaur, painting a picture of a thriving Triassic ecosystem. This community included early turtles, relatives of modern frogs and lizards, and even giant amphibians – creatures that would eventually go extinct at the end of the Triassic Period.

This is a crucial finding because it represents the first evidence of ‍this particular animal⁤ community existing before the end-Triassic extinction event, approximately 201 million ⁢years ago. Previously, scientists believed these groups⁢ only⁢ began to commonly co-exist⁣ after the extinction.”The presence of the pterosaur Eotephradactylus living and interacting in a ⁤community alongside ⁣groups like frogs, lizard relatives,⁤ and turtles is the first⁢ occurrence of this community type in the fossil record,”⁣ Kligman stated. “These groups are commonly⁣ found living together in post-Triassic communities from the Jurassic and⁣ cretaceous,however they had never been found together preceding the end-Triassic extinction event.”

The discovery of eotephradactylus mcintireae ‍ and ⁣its associated ecosystem is rewriting our understanding of early pterosaur evolution and the complex interplay of life‍ during the Triassic‍ Period. It highlights the importance of continued paleontological research and the invaluable contributions of dedicated volunteers ⁤in uncovering the secrets of our ⁢planet’s past.