The authors regret that the following project number stated in the Acknowledgments section is incorrect. The correct number should have been P 222 48-B17. The corrected text appears below.
The authors would like to apologize for any inconvenience this may have caused to the readers of the journal.
Acknowledgements
The authors would like to thank Linde Morawetz for assisting in the statistical computing software R and Denise Ivenz for helping measuring the flies. The authors are additionally grateful to the Core Facility of Cell Imaging and Ultrastructure Research at the University of Vienna for providing the SEM-unit. We thank Northern Cape Nature Conservation for collecting and export permits. This study was supported from funds of the Austrian Foundation for Scientific Research FWF (P 222 48-B17) and the research grant 2013 of the University of Vienna.
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