Odontochelys
... that the oldest known turtle is the 220 million year-old Odontochelys, a prehistoric turtle with teeth and possessing only half a shell?
... that the oldest known <a href="./Turtle" id="mwG7g" rel="mw:WikiLink" title="Turtle">turtle</a> is the 220<span id="mwG7k" typeof="mw:Entity"> </span>million year-old <b id="mwG7o"><a href="./Odontochelys" id="mwG7s" rel="mw:WikiLink" title="Odontochelys">Odontochelys</a></b>, a prehistoric turtle with <a class="mw-redirect" href="./Teeth" id="mwG7w" rel="mw:WikiLink" title="Teeth">teeth</a> and possessing only half a shell?