Joaquinrapor Dinosaur: Bone Found in Patagonian Fossil

Okay, hear’s a breakdown of the key facts from the provided text, focusing on the⁤ newly discovered dinosaur, Joaquinraptor casali:

What is it?

* A new species of megarraptorid – a group of large, carnivorous dinosaurs known for their huge claws.
* Named⁢ Joaquinraptor casali in honor of the son of the lead researcher and a prominent Patagonian paleontologist.

Where and When was it found?

* Southern Chubut, Argentina. Specifically, the Lake Colhué Huapi formation.
*⁢ Lived ⁢during the Upper Cretaceous period, relatively close too the time of the mass extinction event (around 66 million years ago).

Key Features & Significance:

* Size: Approximately 7 meters long and weighed ⁤about a ton.
* Age at Death: Roughly 19 ‍years old.
* “Last Meal” Evidence: A crocodiliform (primitive crocodile) humerus (upper ⁣arm bone) was found between its jaws. This suggests the dinosaur preyed on ‍crocodiliforms, a previously undocumented behavior for this group. It could also indicate another type of ecological interaction, but the “last meal” hypothesis is favored.
* Completeness: It’s one of the most complete megarraptorid skeletons discovered to date. ⁢ It includes a jaw and an ⁢articulated arm, providing valuable anatomical information.
* Ecosystem Role: Joaquinraptor was likely a top predator in its ecosystem.
* Time Capsule: The discovery provides insights ⁤into the dinosaur’s ‍anatomy, behavior, and eating habits.

In essence,this discovery is critically important as⁤ it:

* Adds to our understanding of megarraptorid dinosaurs.
*‍ Provides⁤ evidence of the dinosaur’s diet and predatory behavior.
* Offers a glimpse into the ecosystem of ‍Patagonia just ⁢before the mass extinction event.