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Figure 4 | Frontiers in Zoology

Figure 4

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

Figure 4

Serotonin-like immunoreactive nervous system in 10-day-old Phoronopsis harmeri . In all images, the apical is at the top. Z-projections (B-D) of animals after mono- and double staining for serotonin (yellow) and phalloidin (blue). (A) Live animal; anterior part of the body. The anal side is to the right. (B) Anterior portion of the body viewed from the anal side. (C) Optical sections of the several tentacles with tentacular neurites and solitary perikarya (arrowheads). (D) The right half of the lophophore with the main nerve ring and tentacular neurites. (E) Optical frontal section of the anterior body part viewed from the oral side. Abbreviations: ah – area of the anal hill; cnb – central neurite bundles; ep – epistome; gp – dorsolateral group of perikarya; nc – nephridial channel; t – tentacle; ten – tentacular neurites; tn – tentacular (main) nerve ring; trp – perikarya innerveting the trunk.

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