Fig. 11From: Unity in diversity: a survey of muscular systems of ctenostome Gymnolaemata (Lophotrochozoa, Bryozoa)Developing bud of Paludicella articulata showing the transitory median transversal muscle that forms on the proximal side and later disappears during ontogeny. Abbreviations: am – apertural muscles, dl – developing lophophore, mtm – median transversal muscle, pm – parietal muscle, rm – retractor muscleBack to article page