Infraorder
Cyclorrhapha (Cyclorrhaphan flies)
Lapposyrphus lapponicus. Photo: (c) Denis Doucet, some rights reserved (CC BY-NC)
Cyclorrhapha is an unranked taxon within the infraorder Muscomorpha. They are called “Cyclorrhapha” (‘circular-seamed flies’) with reference to the circular aperture through which the adult escapes the puparium. This is a circumscriptional name that has significant historical familiarity, but in the present classification, this name is synonymous with the more recent “Muscomorpha”; details and reasoning are presented here.