Figure 3.

Tactile and heat sensitivity according to the location of the structures. (A) Bilateral symmetry: responses of left (green) or right (magenta) structures were pooled and compared. Stimulations on both sides induced similar SER rates. (B) Body/appendages: data were pooled for all appendages (green: antennae, mouthparts, legs, wings) and for main body parts (magenta). Body structures responded significantly more than appendages to both tactile and heat stimulations. (C) Heat sensitivity according to the antero-posterior axis: data were pooled separately for head (blue), thorax (green), and abdomen (magenta). A gradient of thermal response intensity was found from head to abdomen. Different letters indicate significant differences in Chi² tests.