Figure 7 | Scientific Reports

Figure 7

From: Innervation of the lophophore suggests that the phoronid Phoronis ovalis is a link between phoronids and bryozoans

Figure 7

Innervation of tentacles in Phoronis ovalis accordingly to data on cytochemistry and laser confocal scanning microscopy. Three-dimensional reconstructions (AG) and Z-projection (H,I) after mono- and double staining for 5-HT (serotonin) (green) and acetylated α-tubulin (grey). (A) abfrontal zones of tentacles: numerous thin neurites extend from the tentacular nerve ring along abfrontal side of each tentacle, (B) paired inter-tentacular nerves extend from the inner nerve ring, (C) frontal tentacular nerves extend from the inner nerve ring, (D) reconstruction of all nerves in several tentacles, (E) two lateroabfrontal neurites exhibit 5ht-like immunoreactivity, (F) 5ht-like immunoreactive perikarya connect the inner nerve ring and are located at the tentacles base between inter-tentacular nerves, (G) reconstruction of tentacular nerves and their connection with the inner nerve ring and tentacular nerve ring, (H) 5ht-like immunoreactive abfrontal neurites, which are numerous near the tentacular nerve ring and are presented as two bundles in each tentacle, (I) 5ht-like immunoreactive perikarya (5ht-p), which are associated with the tentacular nerve ring (tnr) and with the inner nerve ring (inr). Abbreviations: 5ht-afn, two lateroabfrontal neurites exhibited 5ht-like immunoreactivity; 5ht-p (inr), serotonin-like immunoreactive perikarya connected with the inner nerve ring; 5ht-p (tinr), serotonin-like immunoreactive perikarya connected with the tentacular nerve ring; afn, abfrontal neurite bundle; fn, frontal neurite bundle; inr, inner nerve ring; it, inter-tentacular nerves; lfn, laterofrontal neurite bundle; tnr, tentacular nerve ring.

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