part of develops into developing embryonic structure primordium early extended germ band embryo salivary gland common duct anlage adult salivary gland anlage salivary gland duct inclusive primordium FBbt:00017018 fly_anatomy.ontology P2 iSalD A(n) primordium that develops into some adult salivary gland anlage and some salivary gland common duct anlage. It develops from some ventral ectoderm. salivary gland duct specific anlage ventral ectoderm derivative