Overview

• The holotype from the Lago Colhué Huapi Formation preserves a partial skull, vertebrae, ribs, and fore- and hindlimb bones, making it among the most complete megaraptorids reported.
• Stratigraphic evidence places the animal very close to the Cretaceous–Paleogene boundary (about 70–66 million years ago), identifying it as one of the latest-surviving members of its group.
• Bone histology records at least 19 growth lines, indicating a sexually mature but not fully grown individual estimated to exceed seven meters in length and one tonne in mass.
• A crocodiliform humerus found between the jaws, possibly with tooth marks, points to feeding on crocodile relatives, though the authors note the evidence is not definitive.
• Phylogenetic analyses recover megaraptorans nearer to coelurosaurs—potentially as sister to tyrannosaurids—while sedimentology indicates a warm, near-coastal alluvial setting where they likely occupied regional apex roles.