Fig. 8 in Morphology and life cycle of an epiphytic pherusellid ctenostome bryozoan from the Mediterranean Sea

Fig. 8 Apertural area and its musculature in a retracted polypide of an adult Pherusella sp. a Lateral view of the distal zooid part using a histological semithin longitudinal section. Toluidine blue staining. b + c Frontal view of the musculature associated with the aperture area. Maximum intensity projection (b) and volume rendering (c). Note the muscle fibers in the third duplicature band are indicated by asterisk (*). Abbreviations: a – anus, at – atrium, bc – body cavity, co – collar, db – duplicature band, ds – diaphragmatic sphincter, or – orificium, pm – parietal muscle, pv – parieto-vestibular muscle, t – tentacle, tm – tentacle muscle, ts – tentacle sheath, v – vestibulum, vw – vestibular wall