main body follicle cell dorsal appendage forming follicle cell 2017-02-08T14:55:51Z https://github.com/FlyBase/drosophila-anatomy-developmental-ontology/issues/86 FBbt:00046036 dorsal-appendage-forming cell A follicle cell that participates in the formation of the dorsal appendage. There are about 65 of these cells initially located in each of two bilaterally symmetric regions in the dorso-anterior of the oocyte associated follicular epithelium, located immediately posterior to the centripetal follicle cells and lateral of the dorsal midline. There are two distinct subpopulations of these cells: floor cells and roof cells, which reorganize and change shape to form, respectively, the floor and roof of the cellular tube encircling the developing dorsal appendages. These cells secrete chorion proteins into the tube lumens to form the dorsal appendages. During eggshell maturation the dorsal appendage forming cells slough off, revealing the chorionic dorsal appendages inside. filament follicle cell fly_anatomy.ontology