Böhm bristles
The Böhm’s bristle sensor (Bb) also founded that it just exists at the
junction of the base of the 1st segment with the mouthparts.There were
no significant numerical differences between males and females in the
labial papuls and mandibular papuls as a whole (Figs. 5). The overall
variability in morphological characters was also not significant, except
for the presence of a significantly wider Bb base width (♀ = 2.49 ± 0.07
μm, ♂ = 1.92 ± 0.07 μm, t = 5.81, P < 0.01) in
the mandibular palpus of females than males (Tables 5).