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Figure 1.
Schematic diagram of type I mechanosensory organs,
drawn after Keil (1997) and Carlson et al. (1997). A,
mechanosensory macrochaete bristle, an es organ. B, A
single scolopidium of a chordotonal (ch) organ. An embryonic
scolopidium is illustrated; scolopidia in the Johnston's organ have
two sensory neurons and may differ in their attachment to the terminal
supporting cells. Supporting cells (sheath, bristle, and socket cells
in A; scolopale, cap, and ligament cells in
B) and all nuclei are shaded; sensory
neurons and extracellular spaces are white. Cuticular
structures and the scolopale are solid black.
bb, Basal body; cd, ciliary dilation;
ci, cilium; cr, ciliary rootlet;
cu, cuticle; ne, neuron;
sc, scolopale; tb, tubular bundle.
