Reconstruction of the suspected placoderm, <i>Pseudopetalichthys problematica</i>, of Early Devonian Germany.
<a href="https://en.wikipedia.org/wiki/User:Apokryltaros" class="extiw" title="en:User:Apokryltaros">Stanton F. Fink</a>
CC BY-SA 2.5
<span class="int-own-work" lang="en">Own work</span>