Dorsal muscle anatomy and visceral musculature of H. dujardini as revealed by phalloidin staining . Anterior is to the top. Scale bars equal 25 μm. (A) Depth-coded maximum projection of dorsal slices of confocal Z-series. Same specimen as in Figure 4A. Dorsal attachment sites are labeled with capital letters. Inset shows a maximum projection of stylet muscles not visible in the depth-coded image. (B) Scanning electron micrograph showing cuticular depressions and wrinkles associated with dorsal attachment sites. Abbreviations: fu, furca; le, leg; ph, pharyngeal bulb; vi, visceral muscle.