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Fig. 3 | Zoological Letters

Fig. 3

From: Morphology of Stephanella hina (Bryozoa, Phylactolaemata): common phylactolaemate and unexpected, unique characters

Fig. 3

Histological details of the vestibular area of Stephanella hina. Semithin sections. a Longitudinal section of an extended polypide. b Oblique section of a slightly extended specimen showing the apertural area. c Longitudinal section through the vestibular wall of a zooid with retracted polypide showing the dense glandular/sensory (?) orificial cells. d Median longitudinal section of the apertural area of a zooid with retracted polypide. e Cross-section of the folded vestibular wall with contracted vestibular wall musculature. f Close-up of the vestibular wall of a protruded specimen (compare to A). Abbreviations: cae - caecum, dar - diaphragmatic area, db - duplicature band, ec - ectocyst, en - endocyst, int - intestine, or - orifice, osc – orificial (sensory?) cells, sba - statoblast anlage, t - tentacle, ts - tentacle sheath, vd - vestibular dilatators, vw - vestibular wall

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Zoological Letters

ISSN: 2056-306X

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