Fig. 5

Main nerves of the zooid in Crisia eburnea (CLSM). 3D-reconstructions (a-c, f), and Z-projections (d-e, g) of the polypide and cystid below a lophophore after mono- and double staining for tyrosinated α-tubulin (grey) and DAPI (green). Zooids with protruded (a-f) and retracted (g) lophophores are used. a 3D-reconstruction combined with volume rendering; view from the left side. The oral side is at the left. b The same reconstruction in higher magnification; the longitudinal nerves of the body wall are not indicated by abbreviations. c Main nerve elements of the lophophore base and cystid wall viewed from above. d Two branched longitudinal nerves of the body wall with nucleus in the centre of nerve fiber. (E) Longitudinal nerves of the body wall. f Main nerve elements of the lophophore base and cystid wall viewed from the oral side. g Left longitudinal lateral nerve of the digestive tract. Abbreviations: bln – branches of the longitudinal nerves of cystid; cg – cerebral ganglion; cns – circular nerves of atrial sphincter; con – circumoral nerve ring; cpp – circumpharyngeal nerve plexus; cpr – circumpharyngeal nerve ring; lan – latero-anal nerves; lln – longitudinal lateral nerve of the digestive tract; lnw – longitudinal nerves of the body wall; mvn – medial visceral nerve; on – outer nerve ring; sbln – small branches of the longitudinal nerves of cystid; vr – vestibular nerve ring