Unenlagia
| Unenlagia Temporal range: Late Cretaceous
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| Casts of U. paynemili fossils; today the claw is considered one of the hand unguals, not of the foot as shown here | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Clade: | Dinosauria |
| Clade: | Saurischia |
| Clade: | Theropoda |
| Family: | †Unenlagiidae |
| Subfamily: | †Unenlagiinae |
| Genus: | †Unenlagia Novas & Puerta, 1997 |
| Species | |
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Unenlagia was a theropod from the mid-Cretaceous, living about 90 million years ago. The first birds appeared 150 million years ago, evolving from dinosaurs long before Unenlagia lived. Therefore, it is not an ancestor of modern-day birds, but was an evolutionary dead-end. The most bird-like dinosaur ever discovered is the 90-million-year-old Unenlagia comahuensis, a flightless, 4-foot tall, 7.5-foot-long carnivore.
