Thelodont
...that fossil Thelodont fish surprised scientists by showing that stomachs evolved before jaws?
...that fossil <b id="mwE88"><a href="./Thelodonti" id="mwE9A" rel="mw:WikiLink" title="Thelodonti">Thelodont</a></b> fish <i id="mwE9E">(depiction pictured)</i> surprised scientists by showing that stomachs <a href="./Evolution" id="mwE9I" rel="mw:WikiLink" title="Evolution">evolved</a> before jaws?