150-million-year-old stegosaur skull unearthed in Spain

17. toukokuuta 2026

Raportoinut AI

Paleontologists have found the best-preserved stegosaur skull ever discovered in Europe at a site in Riodeva, Spain. The fossil belongs to Dacentrurus armatus and dates to the Late Jurassic period around 150 million years ago.

Researchers from the Fundación Conjunto Paleontológico de Teruel-Dinópolis identified the specimen during excavations at the Están de Colón site in the Villar del Arzobispo Formation. The skull offers rare anatomical details because such fossils are usually too fragile to survive intact over millions of years. Sergio Sánchez Fenollosa, a researcher at the foundation and co-author of the study, said the discovery reveals previously unknown aspects of Dacentrurus armatus anatomy and helps explain how stegosaurian skulls evolved.

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Nanotyrannus confirmed as distinct species from T. rex

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Scientists have determined that Nanotyrannus was a mature, separate species rather than a juvenile Tyrannosaurus rex. A new study analyzed a tiny throat bone from the original fossil, revealing growth patterns indicating adulthood. The findings, published in Science, challenge decades of debate over the dinosaur's identity.

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