SomaticFIG 5A-C: Distal and proximal gonadal sheath cells.

A. Illustration showing the lineage of the sheath cells as they develop from one of four SS (spermatheca/sheath) precursor cells. (Adapated from McCarter et al., 1997.)
B. DIC image of an adult showing one gonad arm. The 5 pairs of sheath cells are colored in purple with the cell borders highlighted.
C. Immunostaining of one dissected adult gonad arm. Marker is anti-CEH-18 which stains sheath cell and DTC (not visible) nuclei. White arrows indicate nuclei. (Image source: D. Killian and E.J. Hubbard.)

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