part of overlaps develops from embryonic/larval foregut embryonic/larval proventriculus embryonic/larval cardiac valve FBbt:00001871 This structure is more correctly referred to as the 'cardia'. Strictly, proventriculus refers to a modification of the foregut, just anterior to the stomodeal valve, found in many insects. Drosophila has no such foregut modification (Miller, 1950). However, the term 'proventriculus' is the one most commonly used for this structure. embryonic/larval gastric valve embryonic/larval cardia fly_anatomy.ontology Proventriculus (cardia) of the embryo or larva. larval proventriculus FBbt:00005772 embryonic/larval midgut embryonic proventriculus proventriculus larval caeca region