FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term labrum ID (Ontology) FBbt:00004522 (Fly Anatomy)
Definition A small, sclerotized, apically pointed flap, distal to the clypeus. It lies in a groove along the median region of the haustellum. The oral opening is behind and at the base of this flap.[ FlyBase:FBrf0007734 ]
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Insertions (FBti)PHENOTYPE_MANIFEST_IN
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 Alleles Genes Images Insertions
 labrum (all annotations which use CV term, excluding "NOT" statements)
     labrum | absent | embryonic stage
      --       --       --
     labrum | embryonic stage
      --       --       --
     labrum | larval stage
      --       --
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maxillary segment
 |__adult maxillary segment_______
adult gnathal segment             |
 |__adult maxillary segment_______|
proboscis                         |
 |__haustellum____________________|
integumentary system              |
 |__integumentary specialization__|
ectodermal derivative             |
 |__anterior ectoderm derivative__|
 |__ventral ectoderm derivative___|
multicellular structure           |
 |__haustellum____________________|
anatomical entity                 |
 |__integumentary specialization__|
                                  labrum  44 rec.
                                   |__anterior labial plate 2 rec.
                                   |__discal sclerite 1 rec.
                                   |__prestomal cavity 1 rec.
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Is a integumentary specialization
anterior ectoderm derivative
ventral ectoderm derivative
Develops from clypeo-labral disc
Part of adult maxillary segment
haustellum
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UBERON:0005905