Figure 11From: Life cycle evolution: was the eumetazoan ancestor a holopelagic, planktotrophic gastraea?Single egg capsule of the polychaete Pygospio elegans. The capsule contains one “intracapsular trochophore” ready for hatching as a pelagic larva and three embryos full of yolk and almost ready for hatching as small juveniles. From [142] with permission from Taylor & Francis Ltd. http://www.tandfonline.com.Back to article page