Skip to main content
Figure 22 | Frontiers in Zoology

Figure 22

From: The normal development of Platynereis dumerilii (Nereididae, Annelida)

Figure 22

Brain and muscle development of P. dumerilii , 64-70 hpf, apical view, dorsal side up. The age of the larvae in each row is given in the lower left corner of the first picture of each row. The displayed staining is indicated at the bottom of each column. A, F, K, P: The dorsal and ventral branches of the circumesophageal connectives (drcc and vrcc) continue to approach each other. The distance between the prototroch ring nerve (ptrn) and the prototroch (pt) increases further (e.g. compare A, F, K and P). Therefore, the overall appearance of the brain is more compact. B, G, L, Q: As it was the case during earlier time points, four serotonergic cells are visible in the brain (the central one marked with a white star, the more dorsal ones marked with white arrows). C, D, H, I, M, N, R, S: Musculature around the stomodeum (stm) forms an arch, which branch off the ventral longitudinal muscles (vlm). E, J, O, T: Additional ciliated cells become visible in the akrotroch to form a line on either side of the dorsal head. CLSM microscopy, maximum projection, Imaris surpass mode. Scale bar in all images 20 μm. Further abbreviations see abbreviations list.

Back to article page