calypter

noun

1. Either of two rounded lobes at the posterior base of the wing in many true flies.

   “The acrosticals are irregularly paired, with numerous accessory setulae between the rows; the lower calypters protrude distinctly beyond the margin of the upper;[…].”

   “The wings are hyaline and slightly smoky yellowish, while the calypters and wing fringes are pale yellowish (Steyskal, 1980).”

   “Traditionally this taxon^([Schizophora]) is subdivided into Calyptratae and Acalyptratae, based respectively on the strong or reduced development of the lower calypter.”