develops from trichome bract FBbt:00005180 fly_anatomy.ontology A specialized, enlarged trichome-like structures that is located close to the base of a bristle. Bracts are induced by bristles, but are not a product of the bristle lineage (del Alamo et al., 2002 and refs therein). They are located on the proximal side of the bristle and share the same polarity. Bracts are found in the legs and wings. bract primordium