Diagram depicting a variety of specimens of the protoceratopsid dinosaur <i>Protoceratops</i>, including <i>P. andrewsi</i> and <i>P. hellenikorhinus</i>, meant to represent the large individual variation in this genus.
<p>Bayan Manadahu → Bayan Mandahu Formation
</p>
Bayn Dzak, Tugriken Shireh, Udyn Sayr → Djadokhta Formation
<a href="//commons.wikimedia.org/wiki/User:PaleoNeolitic" title="User:PaleoNeolitic">PaleoNeolitic</a>
CC BY 4.0
<span class="int-own-work" lang="en">Own work</span>