Paleontologists have actually explained a brand-new genus and types of early riser from the Late Jurassic Zhenghe Fauna of southeastern China. The bird was flightless, had the teeth and killer toe claw of a little predatory dinosaur.
Life restoration of Yuezhuornis yangyuanensisImage credit: Chung-Tat Cheung.
Yuezhuornis yangyuanensis resided in what is now China around 150 million years ago( Late Jurassic date ).
The brand-new types originates from the Zhenghe Fauna, a just recently acknowledged collection of Jurassic fossils that has actually yielded a few of the earliest birds, such as Baminornis and Zhengheornis
“When we took a look at Yuezhuornis yangyuanensiswe were struck by its amazing mix of functions,” stated Dr. Min Wang, a paleontologist with the Institute of Vertebrate Paleontology and Paleoanthropology at the Chinese Academy of Sciences.
The holotype specimen of Yuezhuornis yangyuanensis was discovered in the Nanyuan Formation near Yangyuan town, China’s Fujian province.
The animal had bird-like hips and hind limbs, however likewise carefully jam-packed, serrated teeth and a hyperextensible 2nd toe tipped with a sickle-shaped claw.
Those are qualities normal of deinonychosaurs, the group of predatory dinosaurs that consists of the dromaeosaurids and troodontids.
“It has bird-like pelvic and hind limb structures yet keeps the specialized predatory foot and teeth of a little meat-eating dinosaur,” Dr. Wang stated.
“It reveals us that early riser advancement was much more complex than we formerly understood.”
Evolutionary analyses positioned Yuezhuornis yangyuanensis amongst the earliest branches of the bird family tree, simply beyond the popular Archaeopteryxlong thought about the icon of early risers.
Its forelimbs were considerably brief, a condition typical in non-bird theropods, and its limb percentages looked like those of ground-dwelling birds.
“The outcomes regularly positioned Yuezhuornis yangyuanensis strongly within Avialae (a group including modern-day birds and their closest extinct family members), simply crownward of Archaeopteryx and as a sis taxon to Zhengheornis,” stated Dr. Zhonghe Zhou, likewise from the Institute of Vertebrate Paleontology and Paleoanthropology at the Chinese Academy of Sciences.
The group’s paper appears in the journal Nature
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L. Xu et al2026. Jurassic flightless bird exposes early environmental variety of avialans. Nature 658, 690-697; doi: 10.1038/ s41586-026-10972-z
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