Fig. 2

Cryptocotyle lingua cercariae, body-wall musculature. a: trunk ventral view (tail detached); b: trunk dorsal view; c: scheme showing the arrangement of longitudinal and diagonal muscle fibers on the ventral side of the trunk; d: part of dorsal body wall showing three main muscle layers; e: Z-stack of caudal pocket wall (tail detached); f: frontal optical section of the tail basis. ao – anterior organ; cm – circular muscle fibers; cmp – circular muscle bundles within the wall of caudal pocket; cp – wall of caudal pocket; dm – diagonal muscle fibers; lm – longitudinal muscle fibers; t – tail; tmb – dense muscle bundles close to the tail basis; vgs – ventro-genital sac primordium. Scale bars 10 μm