FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term adult outer optic chiasma giant glial cell ID (Ontology) FBbt:00100526 (Fly Anatomy)
Definition Large glial cell of the outer optic chiasm of the adult optic lobe. It extends many cytoplasmic processes that enwrap fiber bundles at and near the sites of axonal intersection (Tix et al., 1997), but does not invade the neighboring synaptic neuropil (Kremer et al., 2017). There are around 50 of these per optic lobe and each envelops 8-12 fiber bundles, with multiple glial cells sharing each large strand of fibers (Kremer et al., 2017).[ FlyBase:FBrf0096428 FlyBase:FBrf0234767 FlyBase:FBrf0243899 ]
Also Known As "adult outer chiasmal glial cell" ; "adult outer optic chiasm giant glial cell" ; "adult outer optic chiasm large glial cell" (for all, see Synonyms field below)
Comment Kremer et al. (2017) expression and morphological analysis suggests that these are tract neuropil ensheathing glia - https://orcid.org/0000-0002-1373-1705.
Links to External Ontologies
VFB:FBbt_00100526
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Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
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 adult outer optic chiasma giant glial cell (all annotations which use CV term, excluding "NOT" statements)
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optic chiasma
 |__first optic chiasma__________________________
anterior ectoderm derivative                     |
 |__adult optic chiasma glial cell_______________|
adult optic lobe ensheathing glial cell          |
 |__adult optic chiasma glial cell_______________|
adult neuropil glial cell                        |
 |__adult primary neuropil glial cell____________|
adult ensheathing glial cell                     |
 |__adult tract neuropil ensheathing glial cell__|
                                                 adult outer optic chiasma giant glial cell  8 rec.
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Is a adult tract neuropil ensheathing glial cell
adult primary neuropil glial cell
adult optic chiasma glial cell
Develops from larval outer optic chiasma giant glial cell
Part of first optic chiasma
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Synonyms
  • "adult outer chiasmal glial cell" EXACT[ FlyBase:FBrf0243081 ]
    "adult outer optic chiasm giant glial cell" EXACT
    "adult outer optic chiasm large glial cell" EXACT
    "adult XGO" EXACT[ FlyBase:FBrf0234767 ]
Secondary IDs
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VFB:FBbt_00100526