Newly Discovered Megaraptor Dinosaur Found with Crocodile Bone in Its Jaws

Paleontologists in Argentina have unearthed a new species of megaraptor dinosaur, Joaquinraptor casali, from the Lago Colhué Huapi Formation in Patagonia. The specimen, dating back approximately 67 million years to the late Cretaceous period, measures about 23 feet in length and weighs over a ton. Notably, the fossilized remains include a crocodile leg bone lodged in its jaws, suggesting that J. casali may have been feeding on the crocodile at the time of its death.

The discovery provides one of the most complete megaraptoran skeletons to date, encompassing much of the skull, forelimbs, hind limbs, ribs, and vertebrae. This completeness offers valuable insights into the anatomy and predatory behavior of megaraptorans, a group of theropod dinosaurs known for their elongated skulls and large claws.

Dr. Lucio Ibiricu, lead author of the study published in Nature Communications, emphasized the significance of the find, stating that megaraptorans are among the least understood dinosaurs due to previously incomplete fossils. The presence of the crocodile bone in the jaws of J. casali provides clues about its diet and role as an apex predator in its ecosystem.

Further analysis indicates that the specimen was approximately 19 years old at the time of death, suggesting it was sexually mature but not fully grown. The discovery sheds light on the evolutionary history and ecological role of megaraptorans in the late Cretaceous period.