FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term spermatid ID (Ontology) FBbt:00004942 (Fly Anatomy)
Definition One of 64, post meiotic, haploid male germ cells in a spermatid cyst, connected to other spermatids by cytoplasmic bridges. The loss of these cytoplasmic bridge (individualisation) marks the end of the spermatid stage.[ FlyBase:FBrf0064778 ]
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Annotations
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN     417
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       4
Insertions (FBti)  PHENOTYPE_MANIFEST_IN     105
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN      94
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes  Insertions Constructs
 spermatid (all annotations which use CV term, excluding "NOT" statements)     418     53      6    109    124
     spermatid | absent       2       --       --       --       2
     spermatid | absent | germline clone       2       --       --       --       2
     spermatid | adult stage       4       --       --       --       --
     spermatid | adult stage | decreased number       2       --       --       --       2
     spermatid | decreased number       7       --       --       --       2
     spermatid | ectopic       1       --       --       --       --
     spermatid | germline clone       1       --       --       1       --
     spermatid | heat sensitive       1       --       --       --       --
     spermatid | maternal effect       1       --       --       --       --
     spermatid | P-stage       2       --       --       1       --
     spermatid | progressive | temperature conditional       1       --       --       --       --
     spermatid | spermatogenesis       4       --       --       1      2
     spermatid | temperature conditional       3       --       --       --       1
     spermatid | third instar larval stage       4       --       --       --       2
Spanning Tree (Parents/Children)
Only view relationship:
germline cell____________________
male-specific anatomical entity__|
                                 male germline cell
                                  |__spermatid  1117 rec.
                                      |__coalescence stage spermatid 4 rec.
                                      |__elongation stage spermatid 340 rec.
                                      |   |__early elongation stage spermatid(+) 18 rec.
                                      |   |__early-mid elongation-stage spermatid 6 rec.
                                      |   |__late elongation-stage spermatid 14 rec.
                                      |   |__mid-late elongation-stage spermatid 21 rec.
                                      |__individualization stage spermatid 319 rec.
                                      |__onion stage spermatid 136 rec.
                                      |__pre-elongation spermatid 17 rec.
                                          |__agglomeration stage spermatid 1 rec.
                                          |__clew stage spermatid
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Is a male germline cell
Develops from spermatocyte
Part of spermatid cyst
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Synonyms
Secondary IDs
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CL:0000018