FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term adult lamina marginal glial cell ID (Ontology) FBbt:00005722 (Fly Anatomy)
Definition Specialized ensheathing glial cell of the lamina (Edwards et al., 2012; Kremer et al., 2017). These cells form a contiguous layer at the proximal surface of the lamina and associate with multiple lamina columns (Edwards et al., 2012; Kremer et al., 2017). Their processes extend into the lamina, ensheathing proximal parts of the cartridges (Kremer et al., 2017). They also extend protrusions proximally into the outer chiasm (Kremer et al., 2017). It is between the marginal glial cells and epithelial glial cells that the R1-R6 growth cones terminate (Poeck et al., 2001; Winberg et al., 1992). There are around 100 of these cells per lamina (Kremer et al., 2017).[ FlyBase:FBrf0055906 FlyBase:FBrf0134808 FlyBase:FBrf0205531 FlyBase:FBrf0218414 FlyBase:FBrf0234767 ]
Also Known As"adult lamina ensheathing glial cell" ; "L-EG"
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VFB:FBbt_00005722
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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 Alleles Split System Combinations Genes Insertions Constructs
 adult lamina marginal glial cell (all annotations which use CV term, excluding "NOT" statements)
     adult lamina marginal glial cell | somatic clone
      --       --       --       --
     adult lamina marginal glial cell | third instar larval stage
      --       --       --
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lamina
 |__optic cartridge______________________________
 |__adult lamina neuropil associated glial cell__|
synaptic neuropil segment                        |
 |__optic cartridge______________________________|
adult optic lobe neuropil associated glial cell  |
 |__adult optic lobe ensheathing glial cell______|
adult ensheathing glial cell                     |
 |__adult optic lobe ensheathing glial cell______|
adult optic lobe glial cell                      |
 |__adult lamina neuropil associated glial cell__|
                                                 adult lamina marginal glial cell  34 rec.
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Is a adult optic lobe ensheathing glial cell
adult lamina neuropil associated glial cell
Part of optic cartridge
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VFB:FBbt_00005722