Elongatoolithidae
... that fossil eggs classified as Elongatoolithidae have been found with preserved embryos inside?
... that <a class="mw-redirect" href="./Fossil_egg" id="mwCX4" rel="mw:WikiLink" title="Fossil egg">fossil eggs</a> classified as <b id="mwCX8"><a href="./Elongatoolithidae" id="mwCYA" rel="mw:WikiLink" title="Elongatoolithidae">Elongatoolithidae</a></b> have been found with preserved embryos inside?