A record of bilateral gynandromorphism in Epeolus (Hymenoptera: Apidae: Nomadinae)

Abstract

The discovery of a gynandromorph of a North American Epeolus Latreille is reported. A specimen of E. flavofasciatus Smith from Flagstaff, Arizona, USA discovered in the collection of the American Museum of Natural History (AMNH) exhibits male-specific features on the left and female-specific features on the right, consistent with bilateral gynandromorphism (the first known case in the genus). Descriptions and images of the aberrant features exhibited by the specimen are presented.