To view this video please enable JavaScript, and consider upgrading to a web browser that supports HTML5 video Movie S1 3D reconstruction depicting the spatial relationship between the neuroepithelium (FasII+, white) and EONs (R9D11-mCD8-GFP+, green) at 0h ALH. A newly discovered neural stem cell population is generated by the optic lobe neuroepithelium during embryogenesis in Drosophila melanogaster Anna E. Hakes, Leo Otsuki, and Andrea H. Brand Development 2018. 145:None-None; doi: 10.1242/dev.166207 Download Original Video