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Apidologie

, Volume 49, Issue 6, pp 838–851 | Cite as

Adding attractive semio-chemical trait refines the taxonomy of Alpinobombus (Hymenoptera: Apidae)

  • Baptiste Martinet
  • Nicolas Brasero
  • Thomas Lecocq
  • Paolo Biella
  • Irena Valterová
  • Denis Michez
  • Pierre Rasmont
Original article

Abstract

Species taxonomy of bumblebees (Bombus Latreille, 1802) is well known to be problematic due to a potentially high intra-specific variability of morphological traits while different species can converge locally to the same color pattern (cryptic species). Assessing species delimitation remains challenging because it requires to arbitrarily select variable traits whose accuracy continues to be debated. Integrative taxonomic approach seems to be very useful for this group as different independent traits are assessed to propose a rational taxonomic hypothesis. Among operational criteria to assess specific status, the reproductive traits involved in the pre-mating recognition (i.e., the male cephalic labial gland secretions, CLGS) have been premium information. Since these secretions are supposed to be species-specific, these chemical traits can bring essential information where species delimitation is debated. Here, we describe and compare the CLGS of 161 male specimens of nine Alpinobombus taxa: alpinus, balteatus, helleri, hyperboreus, kirbiellus, natvigi, neoboreus, polaris, and pyrrhopygus. We aim also to test the congruence between this new information (reproductive traits) and published genetic dataset. Our results emphasized six distinct groups with diagnostic major compounds: (a) alpinus + helleri with hexadec-9-en-1-ol; (b) polaris + pyrrhopygus with two major compounds hexadec-9-en-1-ol and hexadec-9-enal; (c) balteatus with tetradecyl acetate; (d) kirbiellus with geranyl geranyl acetate; (e) hyperboreus + natvigi with octadec-11-en-1-ol; (f) neoboreus with octadec-9-en-1-ol. Based on this new information, we can confirm the species status of B. alpinus, B. balteatus, B. hyperboreus, B. kirbiellus, B. neoboreus, and B. polaris. We also confirm the synonymy of helleri (Alps) with alpinus (Sweden). However, the specific status of natvigi (Alaska) and pyrrhopygus (Sweden) is questionable and these taxa do not have specific CLGS composition.

Keywords

bumblebees species cephalic labial gland secretions arcto-alpine distribution chemical trait 

Notes

Acknowledgements

The authors thank the Abisko (Sweden), Tarfala (Sweden), Toolik field (USA), Kluane lake (Canada), and Khanymey (W-Siberia) scientific stations for their hospitality and their help in material collection. We acknowledge Hannele Savela (Oulu University, INTERACT administration) for her help in administration process. We thank also K. Urbanová (Institute of Organic Chemistry and Biochemistry ASCR) for her help in chemical analyses. The research leading to these results received funding from the European Union’s Horizon 2020 project INTERACT, under grant agreement no. 730938. BM contributes as PhD student granted by the FRS-FNRS (Fonds de la Recherche Scientifique). PB contributes as a PhD student funded by the Czech Science Foundation (GACR GP14-10035P) and by the University of South Bohemia (GA JU 152/2016/P). The authors thank the Parco Nazionale dello Stelvio for granting permission to collect in their respective territories to the author PB.

Author contribution

Conceived and designed the experiments: BM NB TL PR. Material Collection: BM NB PB PR. Experimentation: BM. Analyzed the data: BM IV. Wrote the paper: BM NB TL PB IV DM PR

Supplementary material

13592_2018_611_MOESM1_ESM.xlsx (18 kb)
Table S1. Table of sampling. Sample code refers to the sample label used in different analyses. All specimens are males. (XLSX 17 kb)
13592_2018_611_MOESM2_ESM.xlsx (1.5 mb)
Appendix S2. Data matrix of cephalic labial gland secretions with minimum, median and maximum of relative concentration of each compound), list of the identified compounds and IndVal analysis with species-specific compounds. Unknown x are undetermined compounds. (XLSX 1518 kb)

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© INRA, DIB and Springer-Verlag France SAS, part of Springer Nature 2018

Authors and Affiliations

  1. 1.University of Mons, Research Institute of Biosciences, Laboratory of ZoologyMonsBelgium
  2. 2.Research Unit Animal and Functionalities of Animal Products (URAFPA)University of Lorraine – INRAVandoeuvre-lès-NancyFrance
  3. 3.Department of Zoology, Faculty of ScienceUniversity of South BohemiaČeské BudějoviceCzech Republic
  4. 4.Biology Centre, Institute of EntomologyCzech Academy of SciencesČeské BudějoviceCzech Republic
  5. 5.Institute of Organic Chemistry and BiochemistryAcademy of Sciences of the Czech RepublicPragueCzech Republic

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