Fig. 1.

Sensillar organization of the modified cilium in a pedicellar campaniform mechanoreceptor of the fly haltere. (A and B) Two representative lateral views of a modified cilium in a campaniform mechanoreceptor taken from the FIB/SEM volume data. The structures are reproduced and presented as cartoon schematics on the right. The colors indicate different structures. The numbers label different segments of the modified cilium (outlined in black). The original volume data are shown in Movie S1. The axes are defined in the main text and shown in each panel. (Scale bars: 1 μm.) (C) The structural model segmented from the volume data. The 3D segmentation is presented in Movie S2. Note that the volume data of a haltere scabellum campaniform mechanoreceptor and the segmented model are also presented (SI Appendix, Fig. S4 and Movies S3 and S4). TB, tubular body. (Scale bar: 1 μm.)