The infrastructure of the Egg Exochorion in Heleomyzidae (Diptera)

摘要

The ultrastructure of the egg exochorion was studied using scanning electron microscopy in five species of four genera of Heleomyzidae. The exochorion surface has the form of a polygonal network with a meshed bottom of polygons (Heleomyza) and a polygonal network combined with longitudinal ridges (Suilla, Tephrochlamys, and Ornitholeria). Species of all the genera, except Heleomyza, have longitudinal rows of aeropylar crypts and separate aeropyles. The micropyle is a small pit or funnel (Heleomyza, Ornitholeria) or a plate with a network of exochorion meshes (Suilla, Tephrochlamys).