Fig. 19 in Boring bryozoans: an investigation into the endolithic bryozoan family Penetrantiidae

Fig. 19 Musculature of the lophophore and digestive tract of Penetrantia parva from northern New Zealand. Each image is oriented with the frontal side upwards and the basal side downwards. a, b Overview of an entire autozooid. c Lophophore base. d–e Details of the basal part of the polypide. f Tentacle tip musculature. g Caecum musculature. al abfrontal lophophoral base muscle, bd buccal dilatator, cac cardiac constrictor, cae caecum, db duplicature band, dis diaphragmatic sphincter, es esophagus, fl frontal lophophoral base muscle, lbm lophophoral base muscles, mo mouth opening, op operculum, pd parieto-diaphragmatic muscle, ph pharynx, pm parietal muscles, pvm parieto-vestibular muscle, rm retractor muscle, s septum, tt tentacle tips, ttm tentacle muscle, vm "v" shaped lophophoral base muscles