Dictyoolithus
... that the shell of the fossil egg Dictyoolithus is made up of five superimposed layers of eggshell units?
... that the shell of the <a href="./Egg_fossil" id="mwARw" rel="mw:WikiLink" title="Egg fossil">fossil egg</a> <i id="mwAR0"><b id="mwAR4"><a href="./Dictyoolithus" id="mwAR8" rel="mw:WikiLink" title="Dictyoolithus">Dictyoolithus</a></b></i> is made up of five superimposed layers of eggshell units?