They are called "Cyclorrhapha" ('circular-seamed flies')[1] with reference to the circular aperture through which the adult escapes the puparium.

[2] This is a circumscriptional name that has significant historical familiarity, but in the present classification, this name is synonymous with the more recent "Muscomorpha".

[3] Cyclorrhapha underwent major adaptive radiation that led to the creation of over 72 000 species.

[4] Cyclorrhapha exhibits significant morphological and molecular diversity, including notable changes in anterior egg development, as exemplified by the role of the exuperantia (exu) gene in Anastrepha fraterculus, a species of great agricultural importance.

[5] Additionally, phylogenetic analyses suggest that the larval structures of Cyclorrhapha have evolved in response to varying food consistencies, reflecting their ecological adaptations.