Lateral muscle anatomy of H. dujardini as revealed by phalloidin staining. Lateral muscle attachment sites are labeled following the system of Halberg et al. . Anterior is to the right. Scale bars equal 25 μm. (A) View of longitudinal musculature. Lateral attachment sites are circled. Muscles labeled `ii' extend from ventral attachment sites to longitudinal attachment sites. Intermediate attachment sites a and b are visible in the ventral anterior and muscles labeled `a' attach to these. (B) Scanning electron micrograph showing cuticular depressions associated with longitudinal attachment sites. Abbreviation: le, leg; ph, pharyngeal bulb.