develops from second segment of antenna FBbt:00004514 fly_anatomy.ontology pedicel https://www.ento.csiro.au/biology/drosophila/melanogaster.html?pedicel Second segment of the antenna located ventrolaterally to the first segment. It is larger than the first segment and somewhat swollen. It has on average 25 bristles of various sizes. The Johnston's organ is contained in this segment. antennal segment 2 segment of antenna presumptive second segment of antenna