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General Information
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| Term |
labellum |
ID (Ontology) |
FBbt:00004531 (Fly Anatomy) |
| Definition |
The broadened, cushion-like, most distal part of the proboscis. It consists of two regions; its lateral surface has a hemispherical, on which there are approximately 33-34 gustatory (chemosensory) and two mechanosensory bristles. The gustatory bristles are arranged into three ill-defined rows of 10-11 bristles: two medial and one located peripherally. The mechanosensory bristles are located in the most dorsolateral area of the labella surface and are shorter than the gustatory sensilla. The inner (medial) surface bears a series of open collecting channels, the pseudotrachea, that converge medially and conduct food to the tip of the labrum. Taste pegs are present in between the pseudotrachea, with 30-40 on each side.[ FlyBase:FBrf0007734 FlyBase:FBrf0074012 FlyBase:FBrf0137194 FlyBase:FBrf0166419 FlyBase:FBrf0211916 FlyBase:FBrf0246028 ] |
| Also Known As |
"labella" ; "labial palpus" ; "labium" |
| Comment |
There is significant sexual dimorphism on the size of the labellum, with the male labellum being bigger than the female, in the anterior-posterior axis (Shanbag et al., 2001). |
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Links to Extrernal Ontologies
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Annotations
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Records annotated with this term OR any of its CHILD TERMS
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Records annotated with this exact term (annotations to child terms are NOT included)
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| Data Class | Field | Records |
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| Alleles (FBal) | PHENOTYPE_MANIFEST_IN | 77 | | Insertions (FBti) | EXPRESSION_STAGE_TISSUE_POSITION | 10 | | Constructs (FBtp) | PHENOTYPE_MANIFEST_IN | 17 |
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Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
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| Full annotation statements | Relevant FlyBase reports |
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| Alleles | Genes | Images | Insertions | Constructs |
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labellum (all annotations which use CV term, excluding "NOT" statements) | 77 | 17 | 14 | 10 | 30 | labellum | cell autonomous | somatic clone | 1 | -- | -- | -- | -- | labellum | conditional | 7 | -- | -- | -- | 7 | labellum | distal | 3 | -- | -- | -- | -- | labellum | larval stage | 1 | -- | -- | -- | 1 | labellum | lateral | 2 | -- | -- | -- | -- | labellum | somatic clone | 4 | -- | -- | -- | 1 |
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Relationships