Figure 11 in Proboscis sensory cells in Nemertea: comparative morphology and phylogenetic implications

Figure 11. Confocal laser scanning micrographs of the everted (A, B, D, E) and inverted (C) proboscis. Red/white – phalloidin-positive (ph-p); green – acetylated α-tubulin-like immunoreactivity (tub-lir). Tub-lir has the strongest signals in the cilia and axons of sensory cells and in the basiepithelial nerve plexus. A, Drepanophoridae gen. sp. 37, substack of transverse sections showing papillae (p) and nerve processes (white arrowheads) joining the proboscis nerve (black arrowhead). B, Drepanophoridae gen. sp. 37, zprojection of transverse sections of the papilla with a ciliary tuft (ct). C, Ototyphlonemertes valentinae, substack of a longitudinal section showing the receptor processes of nonciliated sensory cells. D, Tetrastemma stimpsoni, substack of transverse sections of papillae (p) with centrally situated phalloidinpositive receptor processes (arrowheads) of nonciliated sensory cells. E, Te. stimpsoni, substack of longitudinal sections of papillae (p) with centrally situated phalloidin-positive receptor processes (arrowheads) of nonciliated sensory cells.