Facetotecta
... that although their larvae have been known since 1887, the adults of the crustacean group Facetotecta have never been seen?
... that although their <a href="./Larva" id="mwCzg" rel="mw:WikiLink" title="Larva">larvae</a> have been known since 1887, the adults of the <a href="./Crustacean" id="mwCzk" rel="mw:WikiLink" title="Crustacean">crustacean</a> group <b id="mwCzo"><a href="./Facetotecta" id="mwCzs" rel="mw:WikiLink" title="Facetotecta">Facetotecta</a></b> have never been seen?