Fig. 10
Internal ultrastructure of peg-shaped sensilla based on TEM analysis. A Transverse-oblique section of the inner sensillum lymph space and the two pairs of outer dendritic segments, slightly further proximally of the section in Fig. 9I. The scolopale-like structure is still present at one side of the first (proximal) sheath cell. The dendritic sheath is diminished. B Longitudinal section of the bottom of the inner sensillum lymph space showing the biciliated receptor cell 1 with both basal bodies and basal parts of long outer dendritic segments, surrounded by the first sheath cell (scolopale cell) with elaborated scolopale-like structure. bb, basal body/bodies; ds, dendritic sheath; esp, extracellular space; fi, unspecified cytoplasmic filaments; isl, inner sensillum lymph space; lod, long outer dendritic segments); mi, mitochondrium; mt, microtubules; rc1, receptor cell 1 with long dendritic outer segments); rf, ciliary root filaments; sod, short outer dendritic segments); sco, scolopale-like structure; shc1, first sheath cell (scolopale cell)