Plate Nº 16 · recorded October 10, 2026
Biology & EvolutionReported finding
Winged Dinosaur From China Rewrites Story of How Flight Evolved
A complete 57-cm fossil from China reveals that microraptorines and birds evolved flight features separately, with 30% of traits shared but appearing in a different order.
By Priya Raman3 min read655 words
In brief
- The new species Norellraptor barsboldi is described from a complete 57-cm skeleton found in Liaoning, China.
- The fossil comes from the Lower Cretaceous Jiufotang Formation, roughly 145–100 million years old.
- About 30% of anatomical changes in microraptorine evolution also evolved in birds, but in a different order.
- The dinosaur was at least three years old at death, with plumage partially preserved.
- The study appears in Nature Communications (2026), DOI: 10.1038/s41467-026-77804-6.
A 57-centimeter fossil skeleton unearthed in northeastern China suggests that flight-related features evolved separately in different bird-like dinosaur groups, rather than being inherited from a single common ancestor. Researchers led by Andrea Cau, Qiang Ji and Xuri Wang describe the new species, named Norellraptor barsboldi, in the journal Nature Communications.
The specimen comes from the Jiufotang Formation in Liaoning province, a rock layer laid down during the Lower Cretaceous, roughly between 145 and 100 million years ago. The skeleton is complete and measures 57 centimeters (22 inches), with parts of the plumage still preserved — a rare level of detail that allowed the team to trace how flight-related anatomy was assembled over evolutionary time.
What kind of dinosaur is Norellraptor?
Norellraptor belongs to a group called microraptorines: small, feathered, predatory dinosaurs and close relatives of birds. Most microraptorine fossils come from northeastern China. Earlier discoveries showed that some of these animals carried long feathers on both their forelimbs and hindlimbs — essentially four wings — which hints that they could fly or glide.
Paleontologists have long debated what those wings mean. Did flight adaptations originate once, in the common ancestor of Paraves (the wider group that includes microraptorines and birds), or did separate lineages evolve them on their own? The new fossil weighs in on that debate.
What does the analysis show?
Bone analysis indicates the animal was at least three years old when it died, so the researchers could treat it as a mature individual rather than a juvenile with unfinished anatomy. The fossil reveals a whole collection of features associated with flight.
When the team mapped those traits onto an evolutionary tree, a striking pattern emerged:
- Around 30% of the anatomical changes identified across microraptorine evolution also appeared in the bird lineage.
- But the two groups acquired these shared features in a different order.
That ordering matters. If microraptorines and birds had inherited a common flight apparatus, or a shared developmental process driving its evolution, the same features should generally appear in the same sequence. They do not.
Why does the sequence matter?
Evolution rarely invents complex machinery from scratch. Instead, lineages assemble useful structures step by step, and the order of those steps records how natural selection acted in each case. Finding the same parts bolted together in different sequences in microraptorines and birds points to separate assembly lines — a phenomenon biologists call convergent or independent evolution.
The authors conclude that different selective pressures probably shaped the flight-related features of each lineage. In plain terms: microraptorines and birds faced different environments and demands, and evolution built similar-looking solutions in each group for different reasons.
The evidence already leans toward this independent-evolution scenario, and Norellraptor strengthens that case. Still, the question of whether flight adaptations originated in the common Paraves ancestor remains, formally, an open one.
How solid are the findings?
The study rests on a single, exceptionally well-preserved specimen, which is both its strength and its limit. One skeleton can anchor a broad comparative analysis, but it cannot reveal how widespread this independent-assembly pattern was among all bird-like dinosaurs.
The authors say that further fossil discoveries and bone-growth evidence — the study of how skeletons matured, which can distinguish young animals from small adult species — will be needed to test the pattern across other groups.
The bigger picture
If the conclusion holds, textbooks may need adjusting. Flight has often been treated as a trait with a single deep origin among bird-like dinosaurs, refined as it passed down the family tree. The new fossil supports a messier and arguably more interesting picture: several closely related lineages experimenting with feathers, wings and aerial locomotion in parallel, each following its own evolutionary path toward the sky.
The paper, "Independent assembly of the flight apparatus in a non-avian dinosaur clade," by Xuri Wang and colleagues, appears in Nature Communications (2026), DOI: 10.1038/s41467-026-77804-6.
via Phys.org Biology (Source)
More from Priya Raman
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Senior reporter covering industry trends and analytics at SciBeat.
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