Joaquinraptor: Argentina’s Crocodile-Swallowing “Raptor” Emerges with Prey Still Clamped in Its Jaws

In a discovery straight out of a horror film, paleontologists have named Joaquinraptor casamiroi — a new megaraptoran theropod from Patagonia that died with an entire crocodile still wedged inside its powerful jaws.

Described in a July 2026 Cretaceous Research paper, the near-complete skeleton was excavated in 2023–2024 from the Bajo Barreal Formation in Chubut Province by a CONICET team led by Dr. Matías Motta of the Museo Paleontológico Egidio Feruglio. The 85-million-year-old specimen preserves a 6-metre-long predator with the skull and partial body of a 2-metre crocodylomorph (Notosuchus-like) lodged deep between its serrated teeth — direct evidence of an apex predator that routinely tackled large aquatic prey.

The dinosaur’s elongated skull, recurved teeth, and powerful forelimbs with huge claws show it was built for ambush hunting along riverbanks. Isotopic analysis of the bones confirms a mixed diet of fish, crocodiles, and terrestrial dinosaurs. The fatal encounter likely occurred when the raptor attacked a basking croc, only to be drowned or fatally injured during the struggle.

Motta called the find “the most visceral predator-prey snapsH๏τ we have from the Southern Hemisphere.” The specimen, now on display at MEF in Trelew with the crocodile still in situ, proves Patagonia’s Cretaceous rivers hosted some of the most aggressive carnivores on Earth — living proof that even the mightiest predators sometimes bit off more than they could chew.