Summary:

- This article reports the discovery of a new species of dinosaur, Meraxes gigas, which lived in what is now Argentina during the Late Cretaceous period around 90 million years ago.
- Meraxes gigas was a large theropod dinosaur, a member of the carcharodontosaurid group, and was likely an apex predator in its ecosystem.
- The discovery of this new dinosaur species provides important insights into the evolution and diversity of large carnivorous dinosaurs during the Late Cretaceous period in South America.