FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term neuropil glial sheath ID (Ontology) FBbt:00007117 (Fly Anatomy)
Definition Glial layer that largely surrounds a region of synaptic neuropil in the central nervous system (Younossi-Hartenstein et al., 2003). It is mainly formed by synaptic neuropil ensheathing glia, but these cells also frequently branch into neuropil domains and the layer also contains nuclei of reticular glia (Kremer et al., 2017).[ FlyBase:FBrf0155900 FlyBase:FBrf0234767 ]
Also Known As"glial boundary" ; "glial septum"
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VFB:FBbt_00007117
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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 neuropil glial sheath (all annotations which use CV term, excluding "NOT" statements)
     neuropil glial sheath | late embryonic stage
      --
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nervous system
 |__central nervous system__
organ system subdivision    |
 |__central nervous system__|
multicellular structure     |
 |__portion of tissue_______|
                            neuropil glial sheath  418 rec.
                             |__adult neuropil glial sheath 245 rec.
                             |   |__adult neuropil glial cell(+) 245 rec.
                             |__larval neuropil glial sheath 187 rec.
                                 |__larval neuropil glial cell(+) 187 rec.
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Is a portion of tissue
Part of central nervous system
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VFB:FBbt_00007117