FB2026_03 , released September 17, 2026
FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term larval labial organ ID (Ontology) FBbt:00002720 (Fly Anatomy)
Definition Compound external sense organ of the late embryo or larva that is located in the lower lip of the external opening of the atrium (Campos-Ortega and Hartenstein, 1997; Richter et al., 2024). It consists of 3 sensilla, one with 3 neurons and the others with one each (Campos-Ortega and Hartenstein, 1997). Neurons of the labial organ and ventral pharyngeal sense organ form a large cluster flanking the salivary duct (Campos-Ortega and Hartenstein, 1997).[ FlyBase:FBrf0034076 FlyBase:FBrf0089570 ]
Also Known As "embryonic/larval labial organ" ; "lbo" ; "lower lip sense organ"
Comment Richter et al. (2024) only find the two mono-innervated sensilla on the external larva.
Links to External Ontologies
VFB:FBbt_00002720
Annotations
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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Relevant FlyBase reports
 Alleles Genes Images Insertions Constructs
 larval labial organ (all annotations which use CV term, excluding "NOT" statements)
     larval labial organ | heat sensitive
      --       --       --
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Vocabulary search
larval head
 |__embryonic/larval head sense organ__
larval labial segment                  |
 |__larval labial sensory complex______|
larval sense organ                     |
 |__embryonic/larval head sense organ__|
external sensory organ                 |
 |__external compound sense organ______|
dorsal ectoderm derivative             |
 |__larval labial sensory complex______|
compound sense organ                   |
 |__external compound sense organ______|
sensory cluster                        |
 |__larval labial sensory complex______|
                                       larval labial organ  12 rec.
                                        |__labial organ sensillum
                                            |__labial sensillum 1
                                            |__labial sensillum 2
                                            |__labial sensillum 3
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Is a external compound sense organ
embryonic/larval head sense organ
Part of larval labial sensory complex
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Synonyms
  • "embryonic/larval labial organ" EXACT
    "lbo" EXACT[ FlyBase:FBrf0089570 ]
    "lower lip sense organ" EXACT
Secondary IDs
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VFB:FBbt_00002720