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Figure 10 | Frontiers in Zoology

Figure 10

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

Figure 10

Series of conventional light microscopy images of P. dumerilii , 38-46 hpf. The age of the larvae in each row is given in the lower left corner of the first picture of each row. To give an overview on the morphological changes throughout development, for each time point an apical view of larvae, dorsal side up (first column: A, E, I, M, Q), ventral view, anterior side left (second column: B, F, J, N, R), lateral view, anterior side left and dorsal side up (third column: C, G, K, O, S) and several details (fourth column: D, H, L, P, T) are shown. H: From 40 hpf onwards the chaetae (ch) (white arrow heads) can be seen inside the trunk. L, T: The chaetae (white arrow heads) grow out from the chaetal sacs and increase in length (chs). L: The chaetal sacs are marked with a white stippled line on the right side of the larva. E, N: The stomodeal opening is visible. Note that the intensity of the pigmentation pattern may vary substantially around the prototroch and posterior end among trochophore larvae. F, J, N: Individuals with a high amount of pigment, whereas the individuals in B and R show almost no pigment. Scale bar in all images 20 μm. Further abbreviations see abbreviations list.

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