The typology, number, and distribution pattern of antennal sensilla of Cryptorhynchus lapathi L. (Coleoptera: Curculionidae) were studied using scanning electron microscopy. The antennae of adult females and males were geniculate, consisting of scape, pedicel and a seven-segmented flagellum. Five types of sensilla including 10 subtypes were recorded: Böhm bristles, sensilla basiconica (Sb I-II), sensilla chaetica (Sch I-II), trichoid sensilla (Str I-II) and rod-like sensilla (Sr I-III). Sr III as unique sensilla on adult males were observed on the scape, pedicel and flagellum 1 and 2. There were more Sch I than any other type. No significant sexual differences in the types, numbers, size and distribution of the antennal sensilla were found except for Sr III. The putative functions of sensilla types are also discussed with reference to their morphology and distribution.
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Vol. 125 • No. 3