Gynandromorph of the squash bee Eucera (Peponapis) pruinosa (Hymenoptera: Apidae: Eucerini) from an agricultural field in western Pennsylvania, USA

Gynandromorphs are anomalous individuals that are genetically chimeric and express both male and female phenotypes. Here, we describe the first record of a mosaic gynandromorph of the squash bee Eucera (Peponapis) pruinosa (Say) from a single specimen collected from western Pennsylvania, United States of America (USA). We discuss the known developmental mechanisms resulting in gynandromorphism and how parasitism or environmental contaminants may instigate these mechanisms in wild bee individuals