Dinosaur Named After UNAM Paleontologist: 'Xenovenator espinosai' Discovered in Coahuila

The discovery of the carnivorous dinosaur "Xenovenator espinosai" in Coahuila, Mexico, marks a significant paleontological find, now bearing the name of UNAM paleontologist Luis Espinosa Arrubarrena. The National Autonomous University of Mexico (UNAM) celebrated this honor as a recognition of Espinosa Arrubarrena's scientific career and the university's pioneering work in dinosaur studies.

Espinosa Arrubarrena expressed his gratitude, emphasizing that the distinction is truly a tribute to UNAM's contributions to understanding these ancient creatures, which are a source of pride for the people of Coahuila. The "Xenovenator espinosai" is notable as the first troodontid species reported in Mexico. This group of carnivorous, feathered dinosaurs, closely related to birds, was previously known only from Asia, Europe, and other parts of North America.

This species roamed the Earth approximately 70 million years ago, during the late Cretaceous period, just a few million years before the asteroid impact that led to the extinction of dinosaurs. According to UNAM, the dinosaur stood between 60 and 70 centimeters tall and measured about three meters in length. Its diet consisted of reptiles and fish, caught with small, pointed teeth, and it inhabited coastal plains near rivers and shallow seas.

Analysis of a skull revealed a larger bone depth than in other dinosaurs of its genus, suggesting a thicker skull. This anatomical feature may indicate certain behaviors, such as head-butting for territorial disputes or during mating seasons, or for self-defense. Most dinosaur fossils found in Mexico originate from the Late Cretaceous period, with significant discoveries concentrated in about 10 states, particularly in northern Mexico, with Coahuila being a prime location.