FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term spermatogonium ID (Ontology) FBbt:00004935 (Fly Anatomy)
Definition Male germline cell found in the spermatogonial cyst. It specifically expresses bag of marbles (bam), which is required for its differentiation (Witt et al., 2019).[ FlyBase:FBrf0064778 FlyBase:FBrf0243241 ]
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Direct annotations: records annotated with this exact term (child terms are NOT included)
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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 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes  Insertions Constructs
 spermatogonium (all annotations which use CV term, excluding "NOT" statements)
     spermatogonium | absent
      --       --       --       --
     spermatogonium | adult stage
      --       --
      --
     spermatogonium | calorie restriction conditional
      --       --       --
     spermatogonium | cell non-autonomous | calorie restriction conditional
      --       --       --
     spermatogonium | germline clone | increased number
      --       --       --       --
     spermatogonium | heat sensitive
      --       --
     spermatogonium | increased number
      --       --       --
     spermatogonium | somatic clone
      --       --       --       --
     spermatogonium | temperature conditional
      --       --       --
     spermatogonium | third instar larval stage
      --       --
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Vocabulary search
germline cell
 |__male germline cell___________
male germline cyst               |
 |__spermatogonial cyst__________|
male-specific anatomical entity  |
 |__male germline cell___________|
                                 spermatogonium  367 rec.
                                  |__primary gonial cell 61 rec.
                                  |__secondary spermatogonium 10 rec.
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Is a male germline cell
Develops from male germline stem cell
Part of spermatogonial cyst
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Synonyms
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CL:0000020