title: Antennal and mouthpart sensilla of Acanthoscelides obtectus say (Coleoptera: Bruchidae).
abstract: Acanthoscelides obtectus, a serious pest with a worldwide distribution, damages stored seeds of Phaseolus sp. To acquire a better understanding of the sensory orientation of bean weevils, their antennal and palpal sensilla were investigated. The antennae and palps possess several types of sensory hairs: blunt-tipped sensilla chaetica and trichoidea and also sharp-tipped sensilla trichoidea, these last being the most numerous. Sensilla basiconica are present only on the flagellomeres, but Böhm bristles occur on the basal sclerite and scape of the antennae. The terminal segments of the maxillary and labial palps bear a group of sensilla styloconica with single apical pores. Sensilla coeloconica are located only on the terminal palpal segments. They were unable to detect any distinct morphological differences between males and females. The possible chemosensory, mechanosensory, and thermo-/hygroreceptive functions of the sensilla are discussed.
authors.affiliation: Department of Invertebrate Zoology and Parasitology, University of Gdańsk, Wita Stwosza 59, Gdańsk, 80-308, Poland.
authors.forename: Aleksandra
authors.initials: A
authors.lastname: Urbanek
authors.affiliation: Laboratory of Electron Microscopy, University of Gdańsk, Wita Stwosza 59, Gdańsk, 80-308, Poland.
authors.forename: Dorota
authors.initials: D
authors.lastname: Łuszczek
authors.affiliation: Department of Plant Cytology and Embryology, University of Gdańsk, Wita Stwosza 59, Gdańsk, 80-308, Poland.
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Kapusta
mesh_terms: D000818:Animals; D057506:Arthropod Antennae / Q000648:ultrastructure; D001517:Coleoptera / Q000648:ultrastructure*; D005260:Female; D008297:Male; D008853:Microscopy; D008855:Microscopy, Electron, Scanning; D009055:Mouth / Q000648:ultrastructure*; D058618:Sensilla / Q000648:ultrastructure*
keywords: Acanthoscelides obtectus; antenna; bean weevil; palp; sensilla