Figure 5
From: The normal development of Platynereis dumerilii (Nereididae, Annelida)
Schemes of developmental stages of P. dumerilii : cephalic metamorphosis and small atokous worm. Top: The scheme indicates the key characteristics of each developmental stage. Below each scheme: A brief summary of the key features for the stage is given. Bold: The name of the stage and in brackets the beginning and end of each stage is given. Italic: The key characteristics, which can be used to determine the beginning of each stage. Normal: Additional features of each stage are given. From top to bottom: cephalic metamorphosis, small atokous worm. All schemes shown as ventral view, anterior left. Abbreviations see abbreviations list.