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Fig. 2. Typical curvature of setae and control of attachment and detachment. (A)
Lateral view of setae in the longhorn beetle Clytus arietis; note the
vertical, non-adhesive orientation of the seta tips and the corrugations on
the dorsal sides, which probably prevent self-matting. Scale bar, 20 µm.
(B) Schematic diagrams of two possible seta orientations, convex proximal (Bi;
not found in natural systems) and convex distal (Bii; typical orientation).
Distally convex setae can easily switch between attachment and detachment by
proximal and distal leg movements, respectively.