Observations on the antennal sensilla of Adosomus sp. with scanning electron microscope
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Key Words： Adosomus sp., antenna, sensilla, scanning electron microscope
Abstract： The antennal sensilla of Adosomus sp.（Coleoptera：Curculionidae）were studied with a scanning electron microscope to determine their type, quantity ,distribution and sexual dimorphism. Five types of sensilla were identified, including placoid (Ps, typeⅠ,Ⅱand Ⅲ), chaetica (Ch) and trichoid (T). These types of sensilla differ markedly in their distribution; Ps are the most abundant and widely distributed; Ch are distributed in the first section of the funicle and the club，and T are the least abundant and confined to the club. The types and distribution of sensilla are basically the same in males and females, except that they are significantly more abundant in males.