part of develops into interstitial cell precursor FBbt:00000446 fly_anatomy.ontology large basophilic midgut cell A large basophilic cell that is a precursor of the larval midgut interstitial cells. These cells delaminate from the tip of the posterior midgut primordium during stage 11 to form the midgut interstitial cell primordium. They intercalate back into the midgut epithelium towards the end of stage 14. ICP embryonic/larval midgut interstitial cell developing embryonic structure midgut interstitial cell primordium somatic precursor cell somatic cell of embryonic/larval midgut primordium