Fig. 15

Acetylated alpha-tubulin-lir (gray) in the lophophore of Collarina balzaci. A Detail of the lophophoral base. B Detail of tentacular innervation at the lophophoral base. C Same as in B but labeled with a color code. Abbreviations and color code: afn – abfrontal tentacle neurite bundle (orange), cg – cerebral ganglion (red), CON – circumoral nerve ring (brown), ctsn – compound tentacle sheath nerve, d – distal, dtsn – direct tentacle sheath nerve, itn – intertentacular neurite (purple), itp – intertentacular pit (green), lfn – laterofrontal tentacle neurite bundle (blue), lvn – laterovisceral neurite bundle, mfn – mediofrontal tentacle neurite bundle (yellow), p – proximal, phc – pharyngeal cilia, php – pharyngeal nerve plexus, rdn – radial nerve (pink), tc – tentacle cilia, tfd – trifid neurite bundle