So far, only one described species has been found in the country: Labocania anomala, in 1974 – and even now, there’s some debate over how closely related to other tyrannosaurs it truly is.

After 24 years in a drawer at the Desert Museum in the Mexican city of Saltillo, a group of local paleontologists has established that the bones belong to a species nicknamed Labocania aguillonae ...

The fossil record of Mexican tyrannosaurs has been scrappy. The first known species — the enigmatic Labocania anomala — is known only from jaw bones discovered in Baja California. The Coahuila ...