FB2026_03 , released September 17, 2026

CV Term Report

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General Information

Term

female germline cyst

ID (Ontology)

FBbt:00007137 (Fly Anatomy)

Definition

A cyst of female germ cells interconnected by ring canals. Each cyst originates from a single cystoblast which divides to form 16 cyst cells. These become enveloped in a follicle cell epithelium as they pass through region 2 of the germarium. Cysts that have left the germarium are termed egg chambers.[ FlyBase:FBrf0064777 ]

Comment

Links to External Ontologies

Annotations

Records annotated with this term OR any of its CHILD TERMS

Choose a record type to view annotations for this term and its child terms. Direct annotations and full annotation statements below also provide HitList buttons.

Results list data from multiple species. Choose a record type above to open its HitList.

Direct annotations: records annotated with this exact term (child terms are NOT included)

Data Class	Field	Direct annotations
Alleles (FBal)	PHENOTYPE_MANIFEST_IN
Insertions (FBti)	EXPRESSION_STAGE_TISSUE_POSITION
Insertions (FBti)	PHENOTYPE_MANIFEST_IN
Constructs (FBtp)	PHENOTYPE_MANIFEST_IN

Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records

Full annotation statements	Relevant FlyBase reports
Full annotation statements	Alleles	Genes	Insertions	Constructs
female germline cyst (all annotations which use CV term, excluding "NOT" statements)
female germline cyst \| germline clone		--		--
female germline cyst \| germline clone \| nutrition conditional		--	--	--
female germline cyst \| germline clone \| oogenesis		--	--	--
female germline cyst \| germline clone \| oogenesis \| progressive		--	--	--
female germline cyst \| increased number		--	--
female germline cyst \| nutrition conditional		--	--	--
female germline cyst \| oogenesis		--		--
female germline cyst \| oogenesis stage S1		--		--
female germline cyst \| P-stage		--		--
female germline cyst \| progressive		--
female germline cyst \| somatic clone		--
female germline cyst \| temperature conditional		--	--
female germline cyst \| third instar larval stage		--	--

Spanning Tree (Parents/Children)

ovary
 |__ovariole___________________________
multi-tissue structure                 |
 |__germline cyst______________________|
female organism                        |
 |__female-specific anatomical entity__|
female-specific anatomical entity      |
 |__ovariole___________________________|
multicellular structure                |
 |__ovariole___________________________|
anatomical entity                      |
 |__female-specific anatomical entity__|
                                       female germline cyst  5734 rec.
                                        |__cyst cell of ovary 85 rec.
                                        |   |__cyst cell of female germline 2-cell cyst
                                        |   |__cyst cell of female germline 4-cell cyst
                                        |   |__cyst cell of female germline 8-cell cyst
                                        |   |__cyst cell of female germline 16-cell cyst(+) 20 rec.
                                        |__egg chamber 5551 rec.
                                        |   |__follicle cell(+) 2679 rec.
                                        |   |__nurse cell(+) 1345 rec.
                                        |   |__nurse cell associated follicular epithelium(+) 86 rec.
                                        |   |__oocyte(+) 1864 rec.
                                        |   |__oocyte associated follicular epithelium(+) 194 rec.
                                        |__female germline 2-cell cyst
                                        |   |__cyst cell of female germline 2-cell cyst
                                        |__female germline 4-cell cyst
                                        |   |__cyst cell of female germline 4-cell cyst
                                        |__female germline 8-cell cyst 6 rec.
                                        |   |__cyst cell of female germline 8-cell cyst
                                        |__female germline 16-cell cyst 28 rec.
                                        |   |__cyst cell of female germline 16-cell cyst(+) 20 rec.
                                        |__nurse cell ring canal 202 rec.
                                            |__nurse cell ring canal rim(+) 18 rec.

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	germline cyst female-specific anatomical entity
Develops from	cystoblast
Part of	ovariole
Synonyms & Secondary IDs
Synonyms

Secondary IDs

External Crossreferences & Linkouts