FB2026_03 , released September 17, 2026

CV Term Report

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General Information

Term

larval prothoracic segmental nerve

ID (Ontology)

FBbt:00002085 (Fly Anatomy)

Definition

Larval segmental nerve of the prothoracic segment. Similar to the A1-A7 nerves, it has two roots, anterior and posterior, both formed from neurons of the same segment as the nerve (Campos-Ortega and Hartenstein, 1997). Proximally it shares a glial sheath with the intersegmental nerve before branching from it at the border between the prothorax and mesothorax (Campos-Ortega and Hartenstein, 1997). It receives sensory fibers from the ventral monoscolopidial chordotonal organ, Keilin organ and vc1 sensillum (Campos-Ortega and Hartenstein, 1997). It gives off a thick branch to the ventral intersegmental muscle, while its main branch continues to the ventral transverse musculature, the ventral Kolbchen and the vc2 sensillum (Campos-Ortega and Hartenstein, 1997).[ FlyBase:FBrf0089570 ]

Also Known As

"prothoracic posterior fascicle"

Comment

Links to External Ontologies

VFB:FBbt_00002085

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
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	Constructs
larval prothoracic segmental nerve (all annotations which use CV term, excluding "NOT" statements)

Spanning Tree (Parents/Children)

prothoracic segment
 |__larval prothoracic segment____
 |__prothoracic nerve_____________|
larval thoracic segment           |
 |__larval prothoracic segment____|
nerve                             |
 |__larval segmental nerve________|
 |__prothoracic nerve_____________|
larval peripheral nervous system  |
 |__larval segmental nerve________|
                                  larval prothoracic segmental nerve  5 rec.

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	larval segmental nerve prothoracic nerve
Part of	larval prothoracic segment
Synonyms & Secondary IDs
Synonyms
	"prothoracic posterior fascicle" EXACT "SN" BROAD
Secondary IDs

External Crossreferences & Linkouts
	VFB:FBbt_00002085