part of expresses Delta esg adult midgut epithelium intestinal stem cell Wedge shaped diploid cell found in scattered clusters in the midgut epithelium. The broad end of the wedge lies on the basement membrane and contains the nucleus. The tapering apex of the cell extends up towards the lumen. Can be identified by expression of Delta (and escargot) (Zeng and Hou, 2015). fly_anatomy.ontology FBbt:00007039 ISC somatic stem cell