FB2026_03 , released September 17, 2026

CV Term Report

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General Information

Term

peritrophic membrane

ID (Ontology)

FBbt:00003142 (Fly Anatomy)

Definition

Non-cellular matrix composed of chitin and glycoprotein secreted into the lumen of the proventriculus (cardia), between the outer and intermediate layers by a group of cells in the anterior proventriculus. It covers the luminal side of the midgut posterior to the proventriculus, separating the midgut epithelial cells from the gut contents. It can be divided into 4 distinct layers in the proventriculus and 2 layers in the midgut.[ FlyBase:FBrf0048518 FlyBase:FBrf0064792 FlyBase:FBrf0223413 ]

Also Known As

"peritrophic matrix"

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
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	Insertions	Constructs
peritrophic membrane (all annotations which use CV term, excluding "NOT" statements)
peritrophic membrane \| adult stage

Spanning Tree (Parents/Children)

anatomical structure
 |__acellular anatomical structure__
multi-tissue structure              |
 |__midgut__________________________|
 |__proventriculus__________________|
gut section                         |
 |__midgut__________________________|
 |__proventriculus__________________|
                                    peritrophic membrane  37 rec.
                                     |__adult peritrophic membrane 26 rec.
                                     |__embryonic peritrophic membrane
                                     |__embryonic/larval peritrophic membrane 1 rec.

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	acellular anatomical structure
Part of	midgut proventriculus
Synonyms & Secondary IDs
Synonyms
	"peritrophic matrix" EXACT[ FlyBase:FBrf0223413 ]
Secondary IDs

External Crossreferences & Linkouts