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Fig. 8. (A) Traces of tripod arms in the real image plane in Prionus
coriarius (rear view). (B) A silhouette of the beetle, drawn from a still
frame, illustrates the positions of the tripod arms: LP, LV, arms of the left
tripod; RP, RQ, arms of the right tripod; P, longitudinal arm; Q, transverse
arm; V, vertical arm. Arrows indicate movement direction on opening. Rear
view, pitch 21°, 13 episodes, 184 and 177 frames for two tripods.