FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term scolopidium ID (Ontology) FBbt:00005217 (Fly Anatomy)
Definition Sensillum unit of a chordotonal organ, consisting of a cap cell, a ligament cell, a scolopale cell (sheath cell) and the dendrites of one or more sensory neurons. The basal end of the scolopidium is held in place by a ligament cell, usually attached to the integument. The dendrite of each sensory neuron has a cilium projecting from its tip through the scolopale, a rod like structure secreted by the scolopale cell. The cilium terminates in a dendritic cap, embedded in the cap cell. The cap cell is attached to the integument.[ FlyBase:FBrf0056378 FlyBase:FBrf0098208 FlyBase:FBrf0239412 ]
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VFB:FBbt_00005217
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)EXPRESSION_STAGE_TISSUE_POSITION
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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 Alleles Genes Insertions Constructs
 scolopidium (all annotations which use CV term, excluding "NOT" statements)
     scolopidium | adult stage
      --
      --
     scolopidium | P-stage | somatic clone
      --       --
     scolopidium | somatic clone
      --       --       --
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Vocabulary search 
sense organ
 |__mechanosensory sensory organ__
mechanosensory sensory organ      |
 |__chordotonal organ_____________|
sensillum                         |
 |__internal sensillum____________|
internal sense organ              |
 |__chordotonal organ_____________|
 |__internal sensillum____________|
mechanosensory system             |
 |__mechanosensory sensory organ__|
                                  scolopidium  135 rec.
                                   |__femoral chordotonal organ scolopidium 5 rec.
                                   |   |__femoral chordotonal organ cap cell 1 rec.
                                   |   |__femoral chordotonal organ scolopale cell 4 rec.
                                   |__scolopale cell 39 rec.
                                   |   |__femoral chordotonal organ scolopale cell 4 rec.
                                   |__scolopale rod 7 rec.
                                   |__scolopidial dendritic cap cell 37 rec.
                                   |   |__femoral chordotonal organ cap cell 1 rec.
                                   |   |__lch1 scolopidial dendritic cap cell
                                   |   |__lch5 scolopidial dendritic cap cell 2 rec.
                                   |   |__vch1 scolopidial dendritic cap cell
                                   |   |__vch2 scolopidial dendritic cap cell
                                   |__scolopidial ligament cell 25 rec.
                                       |__lch5 scolopidial ligament cell 1 rec.
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Is a mechanosensory sensory organ
internal sensillum
Develops from chordotonal organ sensory mother cell
Part of chordotonal organ
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VFB:FBbt_00005217