FB2026_01 , released March 12, 2026
FB2026_01 , released March 12, 2026
CV Term Report
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General Information
Term dorsal organ ID (Ontology) FBbt:00002655 (Fly Anatomy)
Definition An external compound sense organ of the antenno-maxillary complex of the larval head consisting of two sensilla, a dome shaped cuticular process, and a region surrounding the base of the dome (Campos-Ortega and Hartenstein, 1997; Komarov and Sprecher, 2022). Each dome sensillum is innervated by seven circularly arranged triplets of olfactory receptor neuron dendrites (Komarov and Sprecher, 2022). Eleven sensory neurons of other modalities innervate six sensilla of each base region (Komarov and Sprecher, 2022; Richter et al., 2024).[ FlyBase:FBrf0074007 FlyBase:FBrf0089570 FlyBase:FBrf0201176 FlyBase:FBrf0251522 ]
Also Known As "antennales Organ" ; "AntSO" ; "DO" (for all, see Synonyms field below)
Comment
Links to External Ontologies
VFB:FBbt_00002655
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       7
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       4
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 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Images Insertions Constructs
 dorsal organ (all annotations which use CV term, excluding "NOT" statements)       7      4      3      4      6
     dorsal organ | embryonic stage       2       --       --       --       --
     dorsal organ | larval stage       3       --       --       --       --
Spanning Tree (Parents/Children)
Only view relationship: 
larval head
 |__larval antenno-maxillary sensory complex__
larval antennal segment                       |
 |__larval antennal segment sense organ_______|
chemosensory sensory organ                    |
 |__olfactory sensory organ___________________|
 |__gustatory sensory organ___________________|
external sensory organ                        |
 |__external compound sense organ_____________|
antennal sense organ                          |
 |__larval antennal segment sense organ_______|
compound sense organ                          |
 |__external compound sense organ_____________|
embryonic/larval head sense organ             |
 |__larval antennal segment sense organ_______|
sensory cluster                               |
 |__larval antenno-maxillary sensory complex__|
olfactory system                              |
 |__olfactory sensory organ___________________|
gustatory system                              |
 |__gustatory sensory organ___________________|
ectodermal derivative                         |
 |__anterior ectoderm derivative______________|
                                              dorsal organ  24 rec.
                                               |__dorsal organ base sensillum
                                               |__dorsal organ dome sensillum
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Is a larval antennal segment sense organ
olfactory sensory organ
gustatory sensory organ
external compound sense organ
anterior ectoderm derivative
Develops from embryonic antennal sense organ
Part of larval antenno-maxillary sensory complex
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Synonyms
Secondary IDs
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VFB:FBbt_00002655