FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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Term elongation stage spermatid ID (Ontology) FBbt:00005310 (Fly Anatomy)
Definition A spermatid which is no longer round, in which the nuclear shape changes from round to needle-shaped, and in which the mitochondrial derivatives unfolds, splits into two parts, and elongates along with the growing axoneme, with the two derivatives becoming unequal in size. The mitochondrial derivatives assume a characteristic position to a plane that splits the central pair of axoneme microtubules which changes slightly through elongation.[ 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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 Alleles Genes Insertions Constructs
 elongation stage spermatid (all annotations which use CV term, excluding "NOT" statements)
     elongation stage spermatid | absent
      --
     elongation stage spermatid | decreased number
      --       --
     elongation stage spermatid | progressive
      --       --       --
     elongation stage spermatid | pupal stage
      --       --
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spermatid cyst
male germline cell__
                    spermatid cyst
                     |__spermatid
                         |__elongation stage spermatid  340 rec.
                    spermatid(+) 1126 rec.
                     |__elongation stage spermatid  340 rec.
                         |__axial complex 139 rec.
                         |   |__Nebenkern derivative(+) 37 rec.
                         |   |__spermatid axoneme 117 rec.
                         |__early elongation stage spermatid 18 rec.
                         |   |__comet stage spermatid 1 rec.
                         |   |__leaf blade stage spermatid 1 rec.
                         |__early-mid elongation-stage spermatid 6 rec.
                         |__late elongation-stage spermatid 14 rec.
                         |__mid-late elongation-stage spermatid 21 rec.
                             |__axial complex 139 rec.
                             |   |__Nebenkern derivative(+) 37 rec.
                             |   |__spermatid axoneme 117 rec.
                             |__early elongation stage spermatid 18 rec.
                             |   |__comet stage spermatid 1 rec.
                             |   |__leaf blade stage spermatid 1 rec.
                             |__early-mid elongation-stage spermatid 6 rec.
                             |__late elongation-stage spermatid 14 rec.
                             |__mid-late elongation-stage spermatid 21 rec.
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Is a spermatid
Develops from pre-elongation spermatid
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Synonyms
  • "intermediate spermatid" RELATED
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