Coelosimilia
... that the extinct coral Coelosimilia is the first known example of a scleractinian coral to have a skeleton not composed of the mineral aragonite?
... that the <a class="mw-redirect" href="./Extinct" id="mwByU" rel="mw:WikiLink" title="Extinct">extinct</a> <a href="./Coral" id="mwByY" rel="mw:WikiLink" title="Coral">coral</a> <i id="mwByc"><b id="mwByg"><a href="./Coelosimilia" id="mwByk" rel="mw:WikiLink" title="Coelosimilia">Coelosimilia</a></b></i> is the first known example of a <a href="./Scleractinia" id="mwByo" rel="mw:WikiLink" title="Scleractinia">scleractinian</a> coral to have a skeleton not composed of the mineral <a href="./Aragonite" id="mwBys" rel="mw:WikiLink" title="Aragonite">aragonite</a>?