Extension and retraction of extraembryonic tissues in <i>C. albipunctata</i>.

<p>Time is shown in hrs:min after egg activation for each image. Extraembryonic tissues are highlighted in yellow. Corresponding embryonic stages (see <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0084422#pone-0084422-g002" target="_blank">Figures 2</a> and <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0084422#pone-0084422-g003" target="_blank">3</a>) are indicated on grey background. See text for details.