FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term thecogen cell ID (Ontology) FBbt:00005173 (Fly Anatomy)
Definition The eo accessory cell that makes the thecogen dendritic cap - a cuticle-like matrix around the tip of the eo-dendrite and which encloses the soma of the eo-neuron.[ FlyBase:FBrf0049554 FlyBase:FBrf0089570 FlyBase:FBrf0111371 ]
Also Known As"external sensory organ sheath cell" ; "neurilemma cell"
Comment
Links to External Ontologies
VFB:FBbt_00005173
Annotations
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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 Images Insertions Constructs
 thecogen cell (all annotations which use CV term, excluding "NOT" statements)
     thecogen cell | ectopic
      --       --
     thecogen cell | embryonic stage
      --       --
      --
     thecogen cell | heat sensitive
      --       --       --
     thecogen cell | increased number
      --       --       --
     thecogen cell | P-stage
      --       --       --
     thecogen cell | somatic clone
      --       --       --
Spanning Tree (Parents/Children)
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Vocabulary search 
sensory organ cell__
eo-type sensillum___|
epidermal cell______|
                    eo sensory organ accessory cell
                     |__thecogen cell  119 rec.
                         |__thecogen dendritic cap
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Is a eo sensory organ accessory cell
Develops from external sensory organ precursor cell IIIb
Part of
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Synonyms
Secondary IDs
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CL:0000380
VFB:FBbt_00005173