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Fig. 3 | BMC Ecology and Evolution

Fig. 3

From: Reconstructing the neuromuscular ground pattern of phylactolaemate bryozoans: new data from the Lophopodidae

Fig. 3

Musculature of the apertural area of Asajirella gelatinosa stained for f-actin, visualised by volume renderings and ortho projections. A Overview scan of the distal body wall shows the orthogonal body wall musculature. Arching over the tentacle sheath are several duplicature bands (arrows). B–D longitudinal vibratome sections of the apertural area. The muscles of the vestibular wall consist primarily of circular muscles (B) that are also very densely arranged around the orifice (C). Vestibulum dilatators were detected in the distal area of the coelomic cavity. The vestibular wall is proximally followed by the tentacle sheath, which shows thick longitudinal muscles (D). E–F Details of the duplicature bands. Prominent longitudinal muscles of the tentacle sheath and comparatively slender muscles of the body wall join each other in the duplicature bands (arrows), that are arranged at the same level between body wall and tentacle sheath. bwm body wall musculature, cm circular muscles, db duplicature bands, dis diaphragmatic sphincter, lm longitudinal muscles, o orifice, t tentacle, ts tentacle sheath, tsm tentacle sheath musculature, vd vestibulum dilatators, v vestibulum, vw vestibular wall, vwm vestibulum muscles

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