part of develops from adult abdominal segment 9 abdominal tergite male genitalia epandrium https://www.ento.csiro.au/biology/drosophila/melanogaster.html?epandrium Horseshoe-shaped tergite which, dorsally, surrounds the male cerci. It contains about 30 epandrial bristles on each side. The left and right sides of the epandrium are connected by the subepandrial sclerite. The ventral part of each side of the epandrium is divided into an epandrial ventral lobe and an epandrial posterior lobe. FBbt:00004839 abdominal tergite 9 fly_anatomy.ontology genital arch periphallic sclerite presumptive epandrium