A new role for antennation in paper wasps (Hymenoptera,Vespidae): antennal courtship and sex dimorphic glands in antennomeres |
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Authors: | R Romani N Isidoro P Riolo F Bin A Fortunato S Turillazzi L Beani |
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Institution: | (1) DAPP – Entomology, University of Perugia, Borgo XX Giugno 74, 06121 Perugia, Italy;(2) SAPROV – Politechnic, University of Marche, via Brecce Bianche, 60131 Ancona, Italy;(3) Department of Animal Biology and Genetics, University of Florence, Via Romana 17, 50125 Florence, Italy |
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Abstract: | Summary. Males of Polistes dominulus perform antennal vibrations and grasping of female antennae during pre-copulatory and copulatory phases. Male antennation plays a relevant role in mating success. In several antennomeres of males of P. dominulus and Vespa crabro, a further species in which we observed male antennation, we found secretory cells of class 1 and 3 associated to the same release site. In P. dominulus, class 3 cells with ampulla-like reservoirs and class 1 cells release their secretion through hairless multiporous areas. In V. crabro, tyloid-like structures are associated with large apodemes. The as yet unidentified secretion of these glands may act as a contact or low-volatile sex pheromone during courtship behaviour.Received 4 December 2003; revised 16 August 2004; accepted 7 September 2004. |
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Keywords: | Polistes dominulus Vespa crabro antennal courtship antennal glands ultrastructure sex pheromone |
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