Figure 10.

Fine structure of muscle M7. STEM-in-SEM images. Sagittal sections; anterior is left, dorsal is up. (a) Overview of the posterior base of leg II showing the distal region of muscle iiM7 (false-coloured in yellow) and its intermediate (white arrow) and distal (black arrow) attachment sites. The distal attachment site is shared with iiM14, iiM8 and iiM12 (not shown in this image). (b–d) Series of sections through the area outlined in (a). White arrowheads indicate the muscle–muscle attachment between M6 and M7. Black arrowheads indicate the beginning of the proximal portion of muscle M7. cu, cuticle; ep, epidermis; in, cuticular invagination; mi, mitochondria; ri, cuticular ridge. Scale bars, 1 µm (a); 500 nm (b–d).