Republicopteron douseae
... that the katydid-like fossil Republicopteron douseae possibly could not sing?
... that the <a href="./Tettigoniidae" id="mwA28" rel="mw:WikiLink" title="Tettigoniidae">katydid</a>-like fossil <i id="mwA3A"><b id="mwA3E"><a href="./Republicopteron" id="mwA3I" rel="mw:WikiLink" title="Republicopteron">Republicopteron douseae</a></b></i> possibly could not sing?