Fig. 16
From: Comparative morphology of the nervous system in three phylactolaemate bryozoans
a-f, Simplified schemes of lophophore innervation in Cristatella mucedo (a, b), Plumatella repens (c, d) and Fredericella sultana (e, f) based on staining with antibodies against serotonin (a, c, e) and FMRFamide (b, d, f) (in (a–d) only tentacle bases are shown on the internal sides of lophophore arms, intertentacular membrane shown by dashed line; in (e, f), only tentacle bases are shown). Only perikaryon and central neurite of bipolar neurons at/below tentacle bases are shown. Abbreviations: bsn, bipolar sensory neurons; cnr, circumpharyngeal nerve ring; g, cerebral ganglion; lh, lophophore nerve tract (horn); m, mouth; mrn, main radial nerve