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Fig. 9 | BMC Evolutionary Biology

Fig. 9

From: Reconstructing the muscular ground pattern of phylactolaemate bryozoans: first data from gelatinous representatives

Fig. 9

Maximum intensity projections of f-actin staining scans of the vestibular pores and white spots as well as semi-thin sections of white spots in Pectinatella magnifica. a: Overview of the vestibular pore which is situated at the anal side of the duplicature and surrounded by muscle fibers. b: Detail of vestibular pore associated with a white spot which is situated where the bulge is visible. c: Maximum intensity projection of the white spot which is situated at the anal side of the duplicature and is embedded in the body wall and surrounded by musculature. The glandular cells of the white spots are visible. d: Semi-thin section stained with toluidine blue of the white spot on the anal side of the duplicature. The glandular cells are visible. e: Maximum intensity projection of the white spot on the outside of the lophophoral arm. The glandular cells are visible and muscle fibers surrounding it are missing. (f): Semi-thin section of the lophophoral white spot. The glandular cells are visible, which have the same appearance as the glandular cells of the white spot on the anal side of the duplicature. Abbreviations: bw – body wall, bwm – body wall musculature, gc - glandular cells, la - lophophoral arms, os - orifice sphincter, t - tentacles, tm – tentacle musculature, vp – vestibular pore, vpm - vestibular pore musculature, ws - white spot, wsm - white spot musculature

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