overlaps eye disc embryonic/larval optic stalk larval retinal basal glial cell embryonic/larval PNS subperineurial glial cell glial cell of eye-antennal disc embryonic/larval carpet glial cell 2011-05-24T04:15:08Z fly_anatomy.ontology VFB:FBbt_00100529 FBbt:00100529 Very large glial cell of the basal embryonic/larval eye disc that also extends through the optic stalk (Edwards and Meinertzhagen, 2010). There are two per eye disc, each covering approximately half of the differentiated part of the disc, with their nuclei generally being found at the posterior end of the imaginal disc, but always posterior to the differentiating neurons (Silies et al., 2007). The glial substrate formed by the carpet glia separates the basal-most migrating glia from the more apical ones (Silies et al., 2007). These cells migrate inwards to give rise to the adult carpet glial cells. Categorized as a retinal basal glial cell in accordance with Tsao et al. (2016) - FBrf0233599 and Chang et al. (2018) - FBrf0239891, since they first appear in the optic stalk, like other retinal basal glia (Choi et al., 1994).