Priabona
... that the fossil big-headed fly Priabona is named for the age of the rocks in which it was found?
... that the fossil <a class="mw-redirect" href="./Big-headed_fly" id="mwChI" rel="mw:WikiLink" title="Big-headed fly">big-headed fly</a> <i id="mwChM"><b id="mwChQ"><a class="mw-redirect" href="./Priabona_(genus)" id="mwChU" rel="mw:WikiLink" title="Priabona (genus)">Priabona</a></b></i> is named for the age of the rocks in which it was found?