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A mysterious wing spine in male coffee berry borers (Coleoptera: Curculionidae: Scolytinae)

Cita: Vega, F.E., Simpkins, A., Bauchan, G., Valdez-Carrasco, J.M., Castillo, A., Infante, F. 2015. A mysterious wing spine in male coffee berry borers (Coleoptera: Curculionidae: Scolytinae). Florida Entomologist. 98 (1). http://dx.doi.org/10.1653/024.098.0155.
ISSN: 0015-4040

Periodo de realización: 2015/06/01 al 2015/01/01

Tipo: Nota científica con arbitraje

Resumen: "The coffee berry borer, Hypothenemus hampei (Ferrari) (Coleoptera: Curculionidae: Scolytinae), is the most important insect pest of coffee worldwide (Vega et al. 2015). As part of a series of studies using low temperature-scanning electron microscopy (LT-SEM) aimed at further expanding our knowledge on the basic morphology of the insect, we noticed a remarkable reduction in the number of facets in the compound eyes of male vs female coffee berry borers (Vega et al. 2014), and in this paper we report on an unusual structure in the hind wings of males. The structure is a spine in the basal part of the hind wing (Figs. 1, 2), which unexpectedly, is not present in all male wings, and is completely absent in female wings. To our knowledge, this article constitutes the first report of such a structure in an insect wing. The hind wings of 40 male and female adult coffee berry borers reared in the laboratory (as described in Vega et al. 2011) were excised and examined under a stereoscope. The spine was photographed using a stereoscope (Fig. 1) as well as LT-SEM (Fig. 2) as described in Vega et al. (2014). Four males had the spine in both hind wings, seven had it in the left wing, 10 had it in the right wing, and 19 did not have the spine. None of the 40 adult females examined exhibited the spine."

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