Summary:

- This article reports the discovery of a new species of dinosaur called Meraxes gigas, which was a large carnivorous theropod that lived during the Late Cretaceous period in what is now Argentina.

- The researchers describe the nearly complete skeleton of Meraxes gigas, which had a large skull with serrated teeth, powerful jaws, and a long neck, suggesting it was an apex predator in its ecosystem.

- The analysis of the Meraxes gigas fossil reveals new insights into the evolution and diversity of large carnivorous dinosaurs, particularly in the Southern Hemisphere, and contributes to our understanding of the late stages of dinosaur evolution before their extinction.