Fig. 7 in Reduction, rearrangement, fusion, and hypertrophy: evolution of the muscular system in polymorphic zooids of cheilostome Bryozoa

Fig. 7 Morphology and anatomy of interzooidal avicularia in Terminoflustra membranaceotruncata. A Stereomicroscope; B light microscope; С inset, D histological sectioning, light microscopy; E, F CLSM, phalloidin staining. A Part of living colony showing autozooids and two avicularia with raised mandibles. B Upper close-up of mandible showing sclerite, large opening in the mandible lower wall and adductor tendons beneath. C Longitudinal section of avicularium with raised mandible; inset, vestigial polypide consisting of upper reduced tentacle surrounded by tentacle sheath with opening, and lower ganglion. D Longitudinal section of avicularium with closed mandible. E, F Muscular elements of avicularium (seen from above)