FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term anterior pharyngeal organ ID (Ontology) FBbt:00002687 (Fly Anatomy)
Definition Sensillum of the lateral part of the embryonic/larval dorsal pouch (Campos-Ortega and Hartenstein, 1997). It contains a single neuron (first seen at embryonic stage 15) that is located dorsal to Bolwig's nerve (at stages 16-17) and fasciculates with the lateropharyngeal nerve (SN-V).[ FlyBase:FBrf0075072 FlyBase:FBrf0089570 ]
Also Known As"apo"
CommentSchmidt-Ott et al. (1994) tentatively assign this to the mandibular segment on the basis of its fasciculation pattern. This evidence is much weaker than the genetic evidence they use to determine the segmental identity of other head sensilla.
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VFB:FBbt_00002687
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 anterior pharyngeal organ (all annotations which use CV term, excluding "NOT" statements)
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larval ocular segment
 |__embryonic/larval dorsal pouch__________
 |__larval ocular segment sense organ______|
larval mandibular segment                  |
 |__larval mandibular segment sense organ__|
embryonic/larval foregut                   |
 |__embryonic/larval dorsal pouch__________|
dorsal pouch                               |
 |__embryonic/larval dorsal pouch__________|
embryonic/larval head sense organ          |
 |__larval ocular segment sense organ______|
 |__larval mandibular segment sense organ__|
                                           anterior pharyngeal organ  4 rec.
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Is a larval ocular segment sense organ
larval mandibular segment sense organ
Part of embryonic/larval dorsal pouch
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VFB:FBbt_00002687