part of develops from develops into anterior midgut primordium anterior adult midgut progenitor developing embryonic structure late extended germ band embryo midgut primordium embryonic primordium of adult anterior midgut adult anterior midgut primordium FBbt:00017028 P1 AdMiAnt adult midgut precursor specific anlage An embryonic primordium that consists of the progenitors of the adult anterior midgut from the time of their segregation from the anterior midgut inclusive primordium during late embryonic stage 11 and early stage 12 until they intercalate into the anterior midgut epithelium during stage 15. fly_anatomy.ontology anterior endoderm derivative