FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term terminal organ ID (Ontology) FBbt:00002690 (Fly Anatomy)
Definition External compound sense organ of the antenno-maxillary complex of the larval head consisting of a distal group of 11 sensilla and a dorso-lateral group of 3 sensilla. This organ is innervated by gustatory receptor neurons that fasciculate with either the larval maxillary nerve (for the dorso-lateral group) or the larval antennal nerve (for the distal group) and terminate in area 2 of the subesophageal ganglion.[ FlyBase:FBrf0047373 FlyBase:FBrf0074007 FlyBase:FBrf0075072 FlyBase:FBrf0089570 FlyBase:FBrf0147119 FlyBase:FBrf0201176 ]
Also Known As"Maxillarorgan" ; "maxillary organ" ; "MxSO" (for all, see Synonyms field below)
Comment
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VFB:FBbt_00002690
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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
 terminal organ (all annotations which use CV term, excluding "NOT" statements)
     terminal organ | embryonic stage
      --       --       --       --
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Vocabulary search 
larval head
 |__larval antenno-maxillary sensory complex__
larval maxillary segment                      |
 |__larval maxillary segment sense organ______|
external sensory organ                        |
 |__external compound sense organ_____________|
dorsal ectoderm derivative                    |
 |__larval maxillary segment sense organ______|
compound sense organ                          |
 |__external compound sense organ_____________|
embryonic/larval head sense organ             |
 |__larval maxillary segment sense organ______|
sensory cluster                               |
 |__larval antenno-maxillary sensory complex__|
                                              terminal organ  69 rec.
                                               |__distal group terminal organ sensillum 3 rec.
                                               |   |__campaniform sensillum of distal group(+) 2 rec.
                                               |   |__knob sensillum of distal group(+)
                                               |   |__pit sensillum of distal group(+) 1 rec.
                                               |   |__spot sensillum S1
                                               |__dorso-lateral group terminal organ sensillum 9 rec.
                                                   |__dorsolateral papilla 7 rec.
                                                   |__dorsomedial papilla 6 rec.
                                                   |__spot sensillum of dorso-lateral group
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Is a larval maxillary segment sense organ
external compound sense organ
Part of larval antenno-maxillary sensory complex
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VFB:FBbt_00002690