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The present study documents the pace of accessory gland and testes degeneration in the wasp Vespula vulgaris by means of a histological and metric approach, that has not been carried out for social wasps so far. To a certain extent, comparison is made with the degenerative processes of the mucus glands of the honeybee drone. In V. vulgaris, no generative(More)
We investigated the age-dependent morphology and ultrastructure of the cornua glands in drones of Apis mellifera. Two epithelial types could be distinguished, each corresponding with a different type of cuticle. The thickness of both epithelia decreases during the period of sexual maturation. Ultrastructural research did not reveal a difference between the(More)
The bulbus is a part of the unique functional penis (endophallus) in the genus Apis and was studied in Apis mellifera drones. The bulbus consists of a thin cuticular membrane, covered by four different epithelia (dorsal epithelium, anterior epithelium, ventral epithelium I and ventral epithelium II). One day before eclosion, pupae have no sclerotised plates(More)
We investigated the morphology and ultrastructure of the cervical lobes of Apis mellifera drones with respect to age. The lobe epithelium decreases while the cuticle thickness increases as the drone gets older. Ultrastructural study revealed that the lobe has no secretory function but possibly acts as an inflatable bag during copulation. Auch wenn Drohnen(More)
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