FB2026_03 , released September 17, 2026

CV Term Report

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General Information

Term

head mesoderm

ID (Ontology)

FBbt:00000127 (Fly Anatomy)

Definition

Anterior region of mesoderm that forms a vertical plate beside the anterior midgut rudiment (Campos Ortega and Hartenstein, 1997). After its initial ingression during ventral furrow formation, it continues to recruit cells from the surface of the embryo until the end of stage 10 (Campos Ortega and Hartenstein, 1997). It gives rise to the pharyngeal musculature, hemocytes, the corpus cardiacum and the visceral muscle of the esophagus (Campos Ortega and Hartenstein, 1997; de Velasco et al., 2006).[ FlyBase:FBrf0064803 FlyBase:FBrf0089570 FlyBase:FBrf0190261 ]

Also Known As

"hms" ; "procephalic mesoderm"

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)	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
head mesoderm (all annotations which use CV term, excluding "NOT" statements)
head mesoderm \| ectopic		--	--

Spanning Tree (Parents/Children)

embryo
 |__developing embryonic structure_____
germ layer                             |
 |__mesoderm___________________________|
developing material anatomical entity  |
 |__developing embryonic structure_____|
 |__primordium_________________________|
                                       head mesoderm  905 rec.
                                        |__dorsal pharyngeal muscle anlage 1 rec.
                                        |__embryonic hemocyte anlage 5 rec.
                                        |__embryonic hemocyte primordium 147 rec.
                                        |   |__crystal cell primordium 32 rec.
                                        |   |__plasmatocyte primordium 122 rec.
                                        |__primary head mesoderm
                                        |__secondary head mesoderm
                                        |__somatic cell of head mesoderm

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	developing embryonic structure primordium
Develops from	head mesoderm anlage
Part of	mesoderm
Synonyms & Secondary IDs
Synonyms
	"head mesoderm P3 primordium" RELATED "head mesoderm primordium P4" RELATED "HeadMes" RELATED "HeadMesP3" RELATED "hms" EXACT[ FlyBase:FBrf0064803 ] "P4 HeadMes" RELATED "procephalic mesoderm" EXACT[ FlyBase:FBrf0089570 ]
Secondary IDs

External Crossreferences & Linkouts