Bakevelliidae
... that members of the extinct bivalve family Bakevelliidae have shells made from rectangular calcium prisms and mother of pearl?
... that members of the extinct <a class="mw-redirect" href="./Bivalve" id="mwCbM" rel="mw:WikiLink" title="Bivalve">bivalve</a> family <b id="mwCbQ"><a href="./Bakevelliidae" id="mwCbU" rel="mw:WikiLink" title="Bakevelliidae">Bakevelliidae</a></b> have shells made from rectangular calcium prisms and <a class="mw-redirect" href="./Mother_of_pearl" id="mwCbY" rel="mw:WikiLink" title="Mother of pearl">mother of pearl</a>?