Fig. 3

Scanning electron micrographs of A. segetum antennae. A,B Schematic diagrams and C,D overall SEM images showing the sexually dimorphic structures of female and male antennae of A. segetum moths. The distribution of coeloconic sensilla (yellow diamonds), trichoid sensilla (magenta triangles), and basiconic sensilla (green circles) are illustrated in the enlarged view of segments in the dashed frame. The stem part of male antennae, the branches, and unbranched part are labelled in the figure. E,F Antennal segments showing representative coeloconic, trichoid, and basiconic sensilla. G Close-up view of a coeloconic sensillum. H Coeloconic sensilla are absent on the branches of male antennae. I Close-up view of trichoid sensilla and basiconic sensilla. The labelled number in the scales represents the length between the first and last marks, and the distance between two marks represents a tenth of the labelled number