FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term embryonic longitudinal glial cell ID (Ontology) FBbt:00001311 (Fly Anatomy)
Definition Embryonic glial cell that is derived from the longitudinal glioblast (LGB) (Beckervordersandforth et al., 2008). It lies at the interface between the cell body rind and the synaptic neuropil of the ventral nerve cord (Ito et al., 1995). There are nine of these cells per hemineuromere in the late embryo (Ito et al., 1995; Beckervordersandforth et al., 2008). Two of these cells are produced by the first (symmetric) division of the LGB and they migrate medially (Klambt and Goodman, 1991). One of the two initial progeny differentiates into the lateral posterior longitudinal glial cell and the other divides to generate the other eight longitudinal glia (Klambt and Goodman, 1991; Peco et al., 2016). At embryonic stage 15 all of the interface glia are aligned dorsally in two rows above the longitudinal connectives (Ito et al., 1995). At early stage 16 two cells in the lateral row begin to move laterally, and one in the medial row moves ventrally along the medial border of the connective neuropil, passing by the cluster of midline glial cells (Ito et al., 1995). The ventral and lateral interface glia occupy their final (larval) positions by early stage 17 (Ito et al., 1995).[ FlyBase:FBrf0054242 FlyBase:FBrf0082171 FlyBase:FBrf0205499 FlyBase:FBrf0214261 FlyBase:FBrf0229106 FlyBase:FBrf0231858 FlyBase:FBrf0245107 ]
Also Known As "embryonic interface glial cell" ; "embryonic LG" ; "IG"
Comment In addition to the 8 embryonic cells (now all known to be LGB progeny) originally described by Ito et al. (1995), the "interface glia" also includes the embryonic precursor to the LP-LG (the other LGB descendant), as more recent publications use "interface glia" synonymously with "longitudinal glia" to represent all (and only) progeny of the LGB, generally preferring the term "longitudinal glia" (Beckervordersandforth et al., 2008; Omoto et al., 2015; Kato et al., 2020).
Links to External Ontologies
VFB:FBbt_00001311
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 embryonic longitudinal glial cell (all annotations which use CV term, excluding "NOT" statements)
     embryonic longitudinal glial cell | ectopic
      --       --
     embryonic longitudinal glial cell | embryonic stage
      --       --
     embryonic longitudinal glial cell | heat sensitive
      --       --       --
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presumptive embryonic/larval nervous system
 |__embryonic glial cell_____________________________
presumptive embryonic/larval central nervous system  |
 |__embryonic ventral nerve cord_____________________|
central nervous system                               |
 |__CNS glial cell___________________________________|
ventral nerve cord                                   |
 |__embryonic ventral nerve cord_____________________|
glial cell                                           |
 |__CNS glial cell___________________________________|
 |__longitudinal glial cell__________________________|
ectodermal derivative                                |
 |__longitudinal glial cell__________________________|
undifferentiated glial cell                          |
 |__embryonic glial cell_____________________________|
                                                     embryonic longitudinal glial cell  138 rec.
                                                      |__embryonic dorsal longitudinal glial cell 17 rec.
                                                      |__embryonic lateral longitudinal glial cell 16 rec.
                                                      |__embryonic ventral longitudinal glial cell 19 rec.
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Is a CNS glial cell
embryonic glial cell
longitudinal glial cell
Part of embryonic ventral nerve cord
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VFB:FBbt_00001311