The genus Gymnomerus is a monotypic group of Palearctic potter wasps, consisting solely of the species Gymnomerus laevipes, commonly known as the Box-headed Mason Wasp.
Gymnomerus laevipes is distinguished by its black and yellow striped pattern, often resembling other wasp species, making precise identification necessary.[1] [2] This species primarily inhabits the Palearctic region, with populations extending from southern England to areas as far north as Nottinghamshire. Its preferred habitats include open areas like brownfields and woodlands.[3] [4]
Gymnomerus laevipes is known for its unique nesting behavior, creating 4 to 12 tubular cells inside hollow plant stems like bramble, burdock, elder, and thistles. These cells are separated by clay partitions, showcasing the wasp's resourcefulness in using natural materials for nest construction.