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Fig. 7 | Zoological Letters

Fig. 7

From: The life of the freshwater bryozoan Stephanella hina (Bryozoa, Phylactolaemata)—a crucial key to elucidating bryozoan evolution

Fig. 7

The retraction process of an individual zooid of Stephanella hina in regard to the ectocyst. a Completely retracted zooid. b Mid-retracted/extended zooid and c protruded zooid. Note that in all images there is a distinct gap between the endocyst and the ectocyst, and that the endocyst slides past the ectocyst during the retraction process. Abbreviations: as – cup-shaped attachment site, ca – caecum, ec – ectocyst, en – endocyst, fb – floatoblast, int – intestine, l – lophophore, o – orifice, oc – opening of the ectocyst tube

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