synallactid

Synallactid is a term used in the field of entomology to describe a type of mating behavior observed in certain species of flies, particularly in the family Dolichopodidae. This behavior involves the male fly grasping the female's wings or abdomen with its legs, often while the female is in flight. The purpose of this behavior is to facilitate mating, as the male's grasp helps to stabilize the female and prevent her from escaping. Synallactid behavior is thought to have evolved as an adaptation to the challenges of mating in flight, where both partners must coordinate their movements to successfully mate. This behavior is not unique to Dolichopodidae, but is also observed in other fly families, such as Asilidae and Empididae. The term "synallactid" is derived from the Greek words "syn," meaning together, and "allaxis," meaning exchange, reflecting the mutual exchange of genetic material that occurs during mating.