A scientific note on a description and behavior of a gynandromorph of the orchid bee Euglossa (Glossura) chalybeata (Hymenoptera, Apidae)

The first case of gynandromorphism in Euglossa chalybeata is described in this study. We document a gynander of Euglossa chalybeata exhibiting mosaic-type asymmetry. This specimen was collected using a methyl salicylate bait at the Usina Hidrelétrica de Belo Monte in Vitória do Xingú, Pará, Brazil, and was compared to a regular male of the species. Photographs of both the gynander and the regular male are provided for reference. We also compare this case with previously reported records of gynandromorphism within the genus Euglossa. The gynander displays typical characteristics of both sexes, with deviations observed in the left and right metatibiae, pre-genital sterna, and genital capsule. Notably, the gynander of Euglossa chalybeata is distinguished from the six previously recorded cases in Euglossa by its deformed metatibiae and almost complete rudimentary genital capsule.