FB2026_03 , released September 17, 2026

CV Term Report

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General Information

Term

larval midline neuron

ID (Ontology)

FBbt:00016016 (Fly Anatomy)

Definition

Larval unpaired primary neuron with its cell body found along the midline of the nervous system (Fontana and Crews, 2012). There are around 18 of these per segment in the late embryo, which are derived from midline precursors (MP1-6) or the median neuroblast (MNB) (Fontana and Crews, 2012). Two sets of neurons can be distinguished; ventral neurons (including MP3 and VUM neurons) and medial neurons (including MP1 and MNB descendants) (Kearney et al., 2004).[ FlyBase:FBrf0180108 FlyBase:FBrf0219766 ]

Comment

Links to External Ontologies

VFB:FBbt_00016016

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)	EXPRESSION_STAGE_TISSUE_POSITION
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
larval midline neuron (all annotations which use CV term, excluding "NOT" statements)
larval midline neuron \| ectopic \| embryonic stage 16		--	--
larval midline neuron \| ectopic \| embryonic stage 17		--	--

Spanning Tree (Parents/Children)

larval neuron
 |__larval CNS neuron____________
neuron                           |
 |__primary neuron_______________|
 |__unpaired neuron______________|
ectodermal derivative            |
 |__ventral ectoderm derivative__|
CNS neuron                       |
 |__larval CNS neuron____________|
                                 larval midline neuron  345 rec.
                                  |__larval medial midline neuron 126 rec.
                                  |   |__larval A00c neuron(+) 7 rec.
                                  |   |__larval A00g neuron(+)
                                  |   |__larval Ladder neuron(+) 5 rec.
                                  |   |__larval MP1 neuron(+) 111 rec.
                                  |   |__larval thoracic ladder-1 neuron 3 rec.
                                  |__larval ventral midline neuron 134 rec.
                                      |__larval MP3 neuron(+) 29 rec.
                                      |__larval VUM neuron(+) 123 rec.

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	ventral ectoderm derivative primary neuron unpaired neuron larval CNS neuron
Develops from	midline neuroblast of ventral nervous system
Part of
Synonyms & Secondary IDs
Synonyms

Secondary IDs

External Crossreferences & Linkouts
	VFB:FBbt_00016016