Praenuculinae
... that the extinct bivalve subfamily Praenuculinae can be told apart from its sister subfamily by looking at teeth?
... that the <a class="mw-redirect" href="./Extinct" id="mwChk" rel="mw:WikiLink" title="Extinct">extinct</a> <a class="mw-redirect" href="./Bivalve" id="mwCho" rel="mw:WikiLink" title="Bivalve">bivalve</a> subfamily <b id="mwChs"><a href="./Praenuculinae" id="mwChw" rel="mw:WikiLink" title="Praenuculinae">Praenuculinae</a></b> can be told apart from its sister subfamily by looking at teeth?