Comparative morphology of sensilla of antennae, maxillary and labial palpi of adult Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae), with specific reference to the typology and possible functions

Abstract Background The lesser grain borer Rhyzopertha dominica (F.) (Coleoptera: Bostrichidae) is a cosmopolitan insect pest of stored cereal grains. In this study, the fine morphology antennae, maxillary and labial palpi as well typology, distribution associated sensilla were comprehensively examined by scanning electron microscopy. Results On six types identified, s. trichodea, chaetica, two subtypes basiconica, ampullacea styloconica, in addition Böhm's (Bs). Sensilla trichodea basiconica most abundant club flagellomeres. Mouth parts R. adapted for chewing; consisted four five segments, respectively. Galea maxilla was distal one ended with brush like organ composed dense field long basiconica. short styloconica ampullacea. Only big sensillum digitiformium found on lateral side segment palp. Conclusions We summarized validated structures different antennae proposed potential functions them detection ecologically relevant stimuli.