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Figure 7 | Frontiers in Zoology

Figure 7

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

Figure 7

Ventral nerve cord and muscle development of P. dumerilii , 24-30 hpf, ventral view, anterior 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, G, M, S: Two axons/axon bundles, which grow from posterior to anterior, connect the posterior serotonergic cell to the prototroch ring nerve. They form the connectives (con) of the ventral nerve cord. B: The first serotonergic cell of the ventral nerve cord is located at the posterior end of the larva (white star). C, D, I, J, O, P, U, V: The dorsal longitudinal muscles are visible form 28 hpf onwards. E, K, Q, W: The stomodeal field (sf) is visible on the ventral side. F, L, R, X: The telotroch (tt) is visible at the posterior end of the larva from around 26 hpf onwards. CLSM microscopy, maximum projection, Imaris surpass mode. Scale bar in all images 20 μm. Further abbreviations see abbreviations list.

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