Paleontologists have unveiled a new species of unenlagiid theropod from the Chorrillo Formation in southern Patagonia, Argentina. This fossil dates to the Maastrichtian stage of the Late Cretaceous, just before the mass extinction that ended the age of dinosaurs.
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| A newly described unenlagiid theropod from the Chorrillo Formation, Argentina, expands the diversity of Gondwanan raptors. Image credit: Microsoft Copilot AI Art Generation, 2026. |
Unenlagiids are a fascinating group of raptor-like dinosaurs unique to Gondwana. Unlike their northern relatives such as Velociraptor, these predators evolved distinct adaptations that reflect the unique ecosystems of South America. The new discovery adds another piece to the puzzle, showing that unenlagiids thrived in Patagonia until the very end of the Cretaceous.
The Chorrillo Formation is already famous for its diverse fossil record, including mammals, sauropods, and other theropods. This new find highlights the richness of southern Patagonia’s ecosystems and reinforces the importance of Argentina as a key region for understanding dinosaur evolution.
🌍 Why It Matters
Reinforces the idea that South America hosted a distinct lineage of raptor-like dinosaurs.
Shows unenlagiids persisted until the end of the Cretaceous.
Adds new anatomical data that may clarify relationships among dromaeosaurids.
Source: Journal of Vertebrate Paleontology – Taylor & Francis
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