ANSP 20901, a fragment of a fossilized mandible attributed to <i>Hynerpeton bassetti</i>.
<p>Reference source:
</p>
<ul><li>Daeschler (2000). "Early tetrapod jaws from the Late Devonian of Pennsylvania, USA"</li></ul>
<a href="//commons.wikimedia.org/wiki/User:Amirani1746" title="User:Amirani1746">Amirani1746</a>
CC BY-SA 4.0
<span class="int-own-work" lang="en">Own work</span>, based on the photo of the fossil published in the study.