Expression patterns of the glial Gal4 drivers used to evaluate glial morphology in the <i>Drosophila</i> adult optic lobe.

(A–M) GFP expression driven by the indicated glial Gal4 driver (described previously in [25]) for the (A, B) optic lobe perineurial glia, (C, D) optic lobe subperineurial glia, (E) optic lobe astrocyte glia, (F) optic lobe ensheathing glia (not including chiasm glia; also drives expression in a subset of neurons), (G) chiasm glia (and marginal glia), (H) medulla, lobulla, and lobula plate cortex glia and proximal satellite glia, (I) lamina astrocytes (epithelial glia), (J) lamina ensheathing glia (marginal glia), (K) lamina-specific cortex glia (proximal satellite glia), (L) lamina subperineurial glia (pseudo-cartridge glia), and (M) lamina perineurial glia (fenestrated glia). (N) A table outlining the glial Gal4 lines and the glial subtypes that they drive expression within. Where relevant, cyan marks CD8::GFP driven by the glia-Gal4, magenta marks Repo, yellow labels Elav and HRP labels the neuropils in white. Panels B and D are maximum projections showing the surface of the optic lobe. Dashed lines outline the neuropils. All scale bars represent 20 μm. (TIF)