Fig. 7

Cotylurus cornutus cercariae, body-wall musculature. a: scheme showing the arrangement of longitudinal, diagonal, and additional groups of muscle fibers on the ventral side of the trunk; b: arrangement of body-wall musculature around the ventral sucker opening; c: tail basis, dorsal view; d: tail basis, ventral view. al + aum – anteriolateral muscle fibers with aU-shaped muscle set; ao – anterior organ; ar – anterioradial muscle fibers; cm – circular muscle fibers; dm – diagonal muscle fibers; lm – longitudinal muscle fibers; t – tail; tmb – dense muscle bundles close to the tail basis; vllm – ventrolateral longitudinal muscle bands; vmlm – ventromedial longitudinal muscle fibers; vs – ventral sucker. Scale bars 10 μm