intermediate labellar taste bristle intermediate labellar taste bristle I-b 2019-02-12T13:57:10Z I-b sensillum Intermediate (bitter-sensitive) labellar taste bristle that detects a narrow range of bitter stimuli, with greater responses to caffeine, umbelliferone and theophylline (Weiss et al., 2011). These are found on the posterior half of the labellum (Weiss et al., 2011). Existence, identity and nomenclature of particular sensilla may not correspond between studies. fly_anatomy.ontology VFB:FBbt_00048163 narrow bitter-sensitive labellar taste bristle I-b FBbt:00048163 sensilla I8, I9 and I10