Fig. 11

Tentacle innervation of Hypophorella expansa. Acetylated alpha tubulin staining (green), nuclei (blue), CSLM, volume rendering. a, b Two specimens showing the lophophoral base and highlighted medio-frontal neurite bundles (yellow) and latero-frontal ones (purple). c Anal view of the lophophoral base showing the two abfrontal neurite bundles (red) that split to innervate two adjacent pairs of tentacles above the ganglion. d Oblique view showing the abfrontal neurite bundles (red) on the anal and lateral sides of the lophophore. e Schematic drawing of the main tentacle neurite bundle branching. Latero-frontal neurites in purple, medio-frontal neurites in yellow and abfrontal neurites in red. Note that distinct asymmetries are present in the medio-frontal tentacle neurite bundle (indicated by dashed lines). Abbreviations: afr – abfrontal neurite bundle, cg – cerebral ganglion, con – circum-oral nerve ring, fgc – foregut ciliation, lfr – latero-frontal neurite bundle, mfr. – medio-frontal neurite bundle, mvn – medio-visceral neurite bundle, pp. – peripharyngeal plexus, rn – radial nerves