FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term Wheeler's organ ID (Ontology) FBbt:00004807 (Fly Anatomy)
Definition A chordotonal organ associated with the anterior of abdominal sternite 2. It is visible externally as a raised patch of smooth cuticle without trichomes or bristles. It consists of two clusters of scolopidia (FBbt:00005217), one on either side of the ventral midline (Smith and Shepherd, 1996). The sensory neurons of Wheeler's organ project through the second segmental nerve of the abdomen and then through the abdominal neuromeres via dorso-lateral tract of the ventral fasciculus (DLV), to terminate in the prothoracic neuromere (Smith and Shepherd, 1996).[ FlyBase:FBrf0032262 FlyBase:FBrf0042053 FlyBase:FBrf0085956 ]
Comment
Links to External Ontologies
VFB:FBbt_00004807
Annotations
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Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN       2
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION       1
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Relevant FlyBase reports
 Alleles Insertions Constructs
 Wheeler's organ (all annotations which use CV term, excluding "NOT" statements)       2      1      3
     Wheeler's organ | ectopic       1       --       --
Spanning Tree (Parents/Children)
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adult sense organ__
chordotonal organ__|
                   adult chordotonal organ
                    |__Wheeler's organ  6 rec.
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Is a adult chordotonal organ
Part of abdominal sternite 2
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VFB:FBbt_00004807