FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 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
Links to External Ontologies
VFB:FBbt_00002690
Annotations
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN      14
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       7
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       4
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Images Insertions Constructs
 terminal organ (all annotations which use CV term, excluding "NOT" statements)      15      7     10      7     22
     terminal organ | embryonic stage       4       --       --       --       --
Spanning Tree (Parents/Children)
Only view relationship: 
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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Synonyms
Secondary IDs
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VFB:FBbt_00002690