Postmetamorphic development of Aeolidiella stephanieae. Light micrographs. Anterior faces upwards and scale bars represent 100 μm in all aspects. All aspects are in dorsal view except for A which is a lateral view. (A) Early vermiform juvenile A. stephanieae (35% of development) with anlage of the rhinophores (r). Note that the body is covered by cilia (cil); e marks the eye and pp the propodium. (B) 26 days after oviposition (43% of development) the anlagen of the first cerata (c) and oral tentacles (ot) appear. (C) 30 days old juvenile A. stephanieae (50% of development) with cnidosacs (cn) at the cerata tips. Note that the rhinophores as well as oral tentacles are longer and thicker now. (D) 39 days after oviposition (65% of development) foot tentacles (ft), a tentacle-like elongation of the propodium, appear. Note that the oral tentacles are almost twice as long as the rhinophores and the additional pairs of cerata. (E) The gross morphology of a mature A. stephanieae (100% of development).