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Figure 8 | Frontiers in Zoology

Figure 8

From: Organization and metamorphic remodeling of the nervous system in juveniles of Phoronopsis harmeri(Phoronida): insights into evolution of the bilaterian nervous system

Figure 8

Organization of main nerve elements at first stages of metamorphosis of Phoronopsis harmeri. Sagittal semithin (A, C) and thin (B, D-E) sections. (A) One of dorsolateral groups of perikarya. (B) Perikarya (pink) of dorsolateral group, which is associated with the main nerve ring. (C) The main nerve ring. (D) Perikaryon (pink) in the main nerve ring. (E) The neuropil of the main nerve ring. Abbreviations: bc – blastocoel; c2 – tentacular coelom; c3 – trunk coelom; d – diaphragm; dcv – dense-core vesicle; gp – groups of perikarya; m – mitochondrion; mc – muscle cell; mt – microtubule; n – nucleus; nc – nephridial channel; nf – nerve fiber; pl – preoral lobe; sv – synaptic vesicle; tn – main nerve ring.

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