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Fine structure of antennal sensilla of the adult mealworm beetle, Tenebrio molitor L. (Coleoptera: Tenebrionidae)



Fine structure of antennal sensilla of the adult mealworm beetle, Tenebrio molitor L. (Coleoptera: Tenebrionidae)



International journal of insect morphology and embryology: (1) 41-60



The types, numbers and distributions of the antennal sensilla of the adult mealworm beetle, Tenebrio molitor, were studied with the scanning and transmission electron microscopes. The types of sensilla include a sexually dimorphic bristle (sensillum chaeticum), a hair organ (sensillum trichodeum), and thin-walled, thick-walled, grooved, flat-tipped, and smooth-surfaced peg organs (sensilla basiconica). Hair organs and smooth-surfaced pegs are common on all 11 antennal segments. The other sensilla are, generally, most numerous on the distal segment, and progressively decrease in numbers on the distal inner and outer sensory fields of segments 10 through 4. Thick-, thin-walled and grooved pegs have pore systems typical of olfactory sensilla. Sensilla chaetica and thick-walled, grooved, flat-tipped, and smooth-surfaced pegs bear an apical pore suggestive of a gustatory function. Smooth-surfaced pegs, hairs, and bristles have a tubular body normally associated with mechanoreception.

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Accession: 015835114

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DOI: 10.1016/0020-7322(77)90029-0


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