SingaporeFeathered Dinosaur Fossil Found
A nearly complete 57-centimeter skeleton of a feathered dinosaur, Norellraptor barsboldi, was discovered in northeastern China, suggesting birds and their close dinosaur relatives developed flight-related features separately. The fossil dates back to the Early Cretaceous, over 100 million years ago.
Global Newsflix 2 min read
Researchers from the Chinese Academy of Geological Sciences and Hebei Geo University identified the new species, which belongs to the microraptorines, a group of small, feathered predators closely related to birds.
The fossil was donated to Hebei Geo University's museum in 2023 after being discovered by a local farmer in Liaoning province's Jianchang County.
The researchers compared Norellraptor with other fossils and found that roughly 30% of the anatomical changes they traced through microraptorine evolution also appeared in the bird lineage, but in a different order.
In microraptorines, finger bones shortened before wrist and hand bones fused and the breastbone lengthened, whereas in the bird lineage, those changes appeared in the opposite order.
Growth marks in Norellraptor's forearm bone suggest it was at least 3 years old and still growing when it died.
The discovery adds evidence to a long-running debate over whether birds and their close dinosaur relatives inherited flight-related anatomy from a common ancestor or developed it separately.
Ji Qiang and his colleagues examined the exquisitely preserved specimen, complete with plumage, teeth, wings, and articulated spine.
Key facts
- Norellraptor barsboldi is a new species of feathered dinosaur discovered in northeastern China.
- The fossil dates back to the Early Cretaceous, over 100 million years ago.
- The species belongs to the microraptorines, a group of small, feathered predators closely related to birds.
- Roughly 30% of the anatomical changes in microraptorine evolution also appeared in the bird lineage, but in a different order.
Three perspectives
Neutral
The discovery of Norellraptor barsboldi provides new insights into the evolution of flight in dinosaurs. Further research is needed to fully understand the implications of this finding. The debate over whether birds and their close dinosaur relatives inherited flight-related anatomy from a common ancestor or developed it separately is ongoing.
Positive
The discovery of Norellraptor barsboldi is a significant breakthrough in the field of paleontology, providing new evidence for the independent evolution of flight in dinosaurs. This finding highlights the complexity and diversity of dinosaur evolution. The research team's work is a testament to the importance of continued exploration and study of dinosaur fossils.
Negative
The discovery of Norellraptor barsboldi raises more questions than answers about the evolution of flight in dinosaurs. The different order of anatomical changes in microraptorines and birds is unclear and requires further study. The debate over the origin of flight in dinosaurs is likely to continue, with some researchers arguing that the evidence is not conclusive.
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