FB2026_03 , released September 17, 2026

CV Term Report

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General Information

Term

Bolwig organ primordium

ID (Ontology)

FBbt:00005830 (Fly Anatomy)

Definition

Primordium of the embryo that gives rise to the larval Bolwig organ. It develops from the most posterior region of the visual primordium, remaining attached to the surface as the rest of the optic placode becomes internalized during stages 12-13 (Green et al., 1993). It consists of approximately 12 cells, which begin to differentiate into photoreceptors during stage 13 (Green et al., 1993). During stages 15-16, the photoreceptors move out of the epidermis and come to lie attached to the outer lining of the dorsal pouch (Green et al., 1993).[ FlyBase:FBrf0064481 FlyBase:FBrf0089570 FlyBase:FBrf0151275 FlyBase:FBrf0243080 ]

Also Known As

"Bolwig's organ primordium" ; "larval eye primordium" ; "P1 BolOrg"

Comment

Links to External Ontologies

Annotations

Records annotated with this term OR any of its CHILD TERMS

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

Data Class	Field	Direct annotations
Alleles (FBal)	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	Images	Constructs
Bolwig organ primordium (all annotations which use CV term, excluding "NOT" statements)

Spanning Tree (Parents/Children)

developing material anatomical entity
 |__primordium____________________
ectodermal derivative             |
 |__anterior ectoderm derivative__|
                                  Bolwig organ primordium  30 rec.

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	primordium anterior ectoderm derivative
Develops from	visual primordium
Part of
Synonyms & Secondary IDs
Synonyms
	"Bolwig's organ primordium" EXACT "larval eye primordium" EXACT[ FlyBase:FBrf0141490 ] "P1 BolOrg" EXACT
Secondary IDs

External Crossreferences & Linkouts
	UBERON:6005830