any of a class (Placodermi) of extinct chiefly Devonian fishes with an armor of bony plates and primitive jaw structures
<a href="https://en.wikipedia.org/wiki/Pearson_Scott_Foresman" class="extiw" title="en:Pearson Scott Foresman">Pearson Scott Foresman</a>
This file has been <b>extracted</b> from another file