FB2026_03 , released September 17, 2026

CV Term Report

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General Information

Term

prothoracic metatarsus

ID (Ontology)

FBbt:00004670 (Fly Anatomy)

Definition

First tarsal segment of the prothoracic leg. Proximally, it articulates with the tibia and distally with the second tarsal segment. Its surface is covered with eight longitudinal rows of bristles and with transverse rows of bristles (TR) in the anterior compartment, between proximo-distal rows 7 and 8. There is sexual dimorphism in the number of TRs (transverse row bristles, TR). In males, 2 TRs are replaced by the sex comb and one central bristle.[ FlyBase:FBrf0031004 FlyBase:FBrf0219028 ]

Also Known As

"prothoracic basitarsus" ; "prothoracic tarsal segment 1" ; "T1 tarsal segment 1" (for all, see Synonyms field below)

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
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	Genes	Images	Insertions	Constructs
prothoracic metatarsus (all annotations which use CV term, excluding "NOT" statements)

Spanning Tree (Parents/Children)

tarsal segment
 |__metatarsus__________________
 |__prothoracic tarsal segment__|
prothoracic tarsus              |
 |__prothoracic tarsal segment__|
                                prothoracic metatarsus  549 rec.
                                 |__metatarsus of female prothoracic leg
                                 |__metatarsus of male prothoracic leg 536 rec.
                                 |   |__prothoracic metatarsal segment central bristle 1 rec.
                                 |   |__sex comb(+) 536 rec.
                                 |__prothoracic metatarsal segment bristle longitudinal row
                                 |__prothoracic metatarsal segment transverse row bristle 4 rec.

Spanning Tree View Settings
Parents/Children View Depth	Show hierarchy levels: for parents, for children
Relationships
Is a	metatarsus prothoracic tarsal segment
Develops from	presumptive prothoracic metatarsus
Part of
Synonyms & Secondary IDs
Synonyms
	"prothoracic basitarsus" EXACT[ FlyBase:FBrf0111704 ] "prothoracic tarsal segment 1" EXACT "T1 tarsal segment 1" EXACT "T1 Ts1" EXACT[ FlyBase:FBrf0219028 ]
Secondary IDs

External Crossreferences & Linkouts
	UBERON:6004670