FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term second segment of antenna ID (Ontology) FBbt:00004514 (Fly Anatomy)
Definition Second segment of the antenna located ventrolaterally to the first segment. It is larger than the first segment and somewhat swollen. It has on average 25 bristles of various sizes. The Johnston's organ is contained in this segment.[ FlyBase:FBrf0007734 FlyBase:FBrf0031004 ]
Also Known As "antennal segment 2" ; "pedicel"
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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      20
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION      19
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       1
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       7
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
 second segment of antenna (all annotations which use CV term, excluding "NOT" statements)      20      7      8     20     14
     second segment of antenna | cell autonomous | ectopic | somatic clone       1       --       --       --       --
     second segment of antenna | heat sensitive       1       --       --       --       1
     second segment of antenna | increased number       1       --       --       --       --
     second segment of antenna | pharate adult stage       1       --       --       --       --
     second segment of antenna | posterior       1       --       --       1       --
     second segment of antenna | somatic clone       2       --       --       --       --
     second segment of antenna | somatic clone - tissue specific       1       --       --       --       --
Spanning Tree (Parents/Children)
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  appendage segment
   |__segment of antenna
       |__second segment of antenna  182 rec.
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Is a segment of antenna
Develops from presumptive second segment of antenna
Part of
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Synonyms
Secondary IDs
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https://www.ento.csiro.au/biology/drosophila/melanogaster.html?pedicel