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2016-12-02 - Colloque/Présentation - poster - Anglais - 1 page(s)

Brasero Et Martin Nicolas, Lecocq Thomas, Martinet Baptiste , Valterová Irena, Urbanova Klara, Dejonghe Roland, Rasmont Pierre , "Chemical analyses of the male cephalic labial gland secretions in bumblebees reveal the unexpected cases of East Palaearctic B. exul and B. filchnerae (Apidae: Thoracobombus: Bombus)" in Entomology in Brussel, Brussel, Belgique, 2016

  • Codes CREF : Systématique des espèces [zoologie] (DI312A)
  • Unités de recherche UMONS : Zoologie (S869)
  • Instituts UMONS : Institut des Biosciences (Biosciences)

Abstract(s) :

(Anglais) Sex-specific chemical secretions has led to the development of the chemotaxonomy in which such chemical traits are now widely used as diagnostic characters. Most of currently available CLGS descriptions concern species from the West-Palearctic region or few from the New World. Here, CLGS descriptions of East-Palaearctic Thoracobombus reveals some astonishing results as strong variability in main compounds in B. exul raising the role of a single main compound in the courtship behavior. In contrast, despite the assurance that B. filchnerae and his European closely related taxon B. muscorum are two different species, we described a low interspecific differentiation in their CLGS main compounds. Moreover, their main compound is the Octadec-9-en-1-ol (C18) while other Thoracobombus species have their first abundant component in C16. It raises the possibility that the courtship behavior as well as environmental constraints could affect the role of the bumblebee males cephalic labial glands secretions.