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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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| Records annotated with this term OR any of its CHILD TERMS | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Choose a record type to view annotations for this term and its child terms. Direct annotations and full annotation statements below also provide HitList buttons. Results list data from multiple species. Choose a record type above to open its HitList. |
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| Direct annotations: records annotated with this exact term (child terms are NOT included) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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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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labial segment |__adult labial segment__________ adult gnathal segment | |__adult labial segment__________| proboscis | |__distiproboscis________________| integumentary system | |__integumentary specialization__| ectodermal derivative | |__ventral ectoderm derivative___| multicellular structure | |__distiproboscis________________| anatomical entity | |__integumentary specialization__| labellum 416 rec. |__adult labellum sensillum 241 rec. | |__labellar mechanosensory bristle | |__labellar taste bristle(+) 228 rec. | |__labellar taste peg(+) 3 rec. |__border hair |__labellar cap 215 rec. | |__intermediate labellar taste bristle(+) 65 rec. | |__large labellar taste bristle(+) 81 rec. | |__short labellar taste bristle(+) 140 rec. |__labellar gland 2 rec. |__pseudotrachea 68 rec. |
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Relationships
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| Is a |
integumentary specialization ventral ectoderm derivative |
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| Develops from | labial disc | ||
| Part of |
adult labial segment distiproboscis |
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Synonyms & Secondary IDs
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External Crossreferences & Linkouts
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