Plagioolithus
... that Plagioolithus is thought to be the oldest known fragment of bird egg?
... that <i id="mwCDk"><b id="mwCDo"><a href="./Plagioolithus" id="mwCDs" rel="mw:WikiLink" title="Plagioolithus">Plagioolithus</a></b></i> is thought to be the oldest known fragment of <a href="./Bird_egg" id="mwCDw" rel="mw:WikiLink" title="Bird egg">bird egg</a>?