Location and Morphological Structure Observation of Male Setiferous Sex Patch in the Red Flour Beetles Tribolium castaneum (Herbst)

doi:10.11924/j.issn.1000-6850.2013-0545

Abstract

Abstract: To understand the location and Morphological structure of setiferous sex patch, both stereo microscope and scanning electron microscope examinations were made in males of the red flour beetles Tribolium castaneum (Herbst). The results showed that the red flour beetles were sexually dimorphic, with adult males possessing setiferous sex patches located on the femora of their first pair of legs. The smooth, short and fluted setae arose from the exterior surface of the setiferous sex patch whose tips were above the level of the cuticle, and the setae were particularly sparse within the center of the setiferous sex patch but appeared dense in arrangement at its periphery. The surface area of the patch measured (1247.7 ± 133.3) μm², and each patch contained (56 ± 6.2) setae. This study provided the basis for developing the extraction and identification of male-produced secretions from the prothoraeic femoral setiferous sex patch of T. castaneum.

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