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Fig. 8. Lateral tenacity (friction force/total contact area of 12 pulvilli) calculated for insects of various size. Three groups of insects with different average areas of pulvilli are considered. The first group consists of juvenile insects, the third group consists of adults, the second group is mixed. There is no significant difference in the lateral tenacity between the groups (H=0.64, d.f.=2, P=0.726, Kruskal-Wallis one-way ANOVA on Ranks).