Scientists Discover Oldest Bird Fossils, Rewrite History of Avian Evolution

A photograph and interpretive line drawing show the Baminornis zhenghensis fossil – credit: Min WangAccording to a truly field-altering fossilized bird found in China, birds already existed in the Late Jurassic period, approximately 160 million years ago.The new discovery suggests that rather than a linear evolutionary path from dinosaur to bird, these two orders evolved somewhat simultaneously.An artistic representation of the newly discovered species, Baminornis zhenghensis, with the preserved bones highlighted – credit: Zhao Chuang.Baminornis zhenghensis is the world’s oldest species of avid. A holotype fossil was recently found in East China’s Fujian Province and described in the journal Nature. The pelvis, trunk, forelimbs, and part of the hindlimb are all intact.“Baminornis is a landmark discovery and ranks among the most important bird fossils unearthed since the discovery of Archaeopteryx in the early 1860s,” Stephen Brusatte, a paleontologist from the University of Edinburgh who was not involved in the study but wrote a commentary accompanying it, tells Xinhua.“This is a groundbreaking discovery. It overturns the previous situation that Archaeopteryx was the only bird found in the Jurassic Period,” Zhonghe Zhou, a paleontologist at the Chinese Academy of Sciences and co-author of the study, tells the Chinese news agency...
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Antarctica Yields Intact Skull — An Ancestor of Today’s Waterfowl That Survived Dinosaur Extinction

An artist’s impression of Vegavis iaai, an ancestor of modern waterfowl – credit: Mark Witton / SWNSA modern-looking diving bird was living somewhere in Antarctica when a massive asteroid struck the Earth and caused the dinosaurs to go extinct.But unlike the dinosaurs, this early ancestor of today’s waterfowl survived that mass extinction event, and a nearly complete skull has now been recovered by a special paleontological project on the southern continent.The animal is called Vegavis iaai—a Late Cretaceous diving bird which lived at the same time that Tyrannosaurus rex was dominating North America.The skull exhibits a long, pointed beak and a brain shape unique among all known birds previously discovered from the Mesozoic Era—the epoch stretching from 252 to 66 million years ago, and comprising the Triassic, Jurassic, and Cretaceous Periods.Researchers say the features place Vegavis in the group that includes all modern birds, representing the earliest evidence of a now widespread and successful evolutionary radiation across the planet.Assistant Professor of Biology Chris Torres from the University of the Pacific acquired the fragments of the animal’s skull from a geology sample obtained during a 2011 expedition by the Antarctic Peninsula Paleontology Project.Meticulously extracted and scanned into a 3D rendering, Torres said...
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