The Mongolian fossils of Zavacephale rinpoche are at least 14 million years older than the previously oldest known pachycephalosaur, Sinocephale from China.
Sources
- Dome-headed dinosaurs are rare. Scientists just found the most ... (nationalgeographic.com)
- https://www.nature.com/articles/s41586-025-09213-6 (nature.com)
- https://greekreporter.com/2025/09/19/oldest-complete-dome-headed-dinosaur-mongolia/ (greekreporter.com)
- https://dinopedia.fandom.com/wiki/Zavacephale (dinopedia.fandom.com)
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