part of develops from intercalary segment embryonic/larval foregut hypopharyngeal lobe FBbt:00001863 fly_anatomy.ontology Protuberance of the procephalon that marks the rudimentary third (intercalary) head segment (Hartenstein, 1993). It first becomes apparent at stage 11 of embryogenesis. This lobe bears the primordium of the posterior pharyngeal sense organ (hypopharyngeal organ) (Jurgens and Hartenstein, 1993). developing material anatomical entity