FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term spermatid cyst ID (Ontology) FBbt:00005287 (Fly Anatomy)
Definition A male germline cyst consisting of 2 cyst cells and 64 spermatids.[ FlyBase:FBrf0064778 ]
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 spermatid cyst (all annotations which use CV term, excluding "NOT" statements)
     spermatid cyst | germline clone
      --       --       --
     spermatid cyst | increased number
      --
      --
     spermatid cyst | progressive | temperature conditional
      --       --       --
     spermatid cyst | spermatogenesis
      --       --       --
     spermatid cyst | temperature conditional
      --       --       --
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Vocabulary search 
germline cyst____________________
testis___________________________|
male-specific anatomical entity__|
                                 male germline cyst
                                  |__spermatid cyst  1198 rec.
                                      |__spermatid 1126 rec.
                                      |   |__acroblast 2 rec.
                                      |   |__acrosomal granule 2 rec.
                                      |   |__coalescence stage spermatid 4 rec.
                                      |   |__elongation stage spermatid(+) 340 rec.
                                      |   |__individualization stage spermatid(+) 319 rec.
                                      |   |__onion stage spermatid(+) 136 rec.
                                      |   |__pre-elongation spermatid(+) 17 rec.
                                      |   |__protein body 3 rec.
                                      |   |__spermatocyte cell spectrosome 8 rec.
                                      |__spermatid cyst cell 30 rec.
                                          |__head cyst cell 25 rec.
                                          |__tail cyst cell 6 rec.
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Is a male germline cyst
Develops from secondary spermatocyte cyst
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