FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term larval mesothoracic segmental nerve ID (Ontology) FBbt:00002125 (Fly Anatomy)
Definition Larval segmental nerve of the mesothoracic segment. Similar to the A1-A7 nerves, it has two roots, anterior and posterior, both formed from neurons of the same segment as the nerve (Campos-Ortega and Hartenstein, 1997). Proximally it shares a glial sheath with the intersegmental nerve (Campos-Ortega and Hartenstein, 1997). It receives sensory fibers from the ventral monoscolopidial chordotonal organ, Keilin organ and vc1 sensillum (Campos-Ortega and Hartenstein, 1997). It gives off a thick branch to the ventral lateral muscle, while its main branch continues to the lateral transverse musculature, the ventral Kolbchen and the vc2 sensillum (Campos-Ortega and Hartenstein, 1997). It additionally receives sensory fibers from the prothoracic lch3 chordotonal organ (Campos-Ortega and Hartenstein, 1997).[ FlyBase:FBrf0089570 ]
Also Known As"mesothoracic posterior fascicle"
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VFB:FBbt_00002125
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)PHENOTYPE_MANIFEST_IN
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 Alleles Insertions
 larval mesothoracic segmental nerve (all annotations which use CV term, excluding "NOT" statements)
     larval mesothoracic segmental nerve | adult stage
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mesothoracic segment
 |__larval mesothoracic segment___
 |__mesothoracic nerve____________|
larval thoracic segment           |
 |__larval mesothoracic segment___|
nerve                             |
 |__larval segmental nerve________|
 |__mesothoracic nerve____________|
larval peripheral nervous system  |
 |__larval segmental nerve________|
                                  larval mesothoracic segmental nerve  5 rec.
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Is a larval segmental nerve
mesothoracic nerve
Part of larval mesothoracic segment
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Synonyms
  • "mesothoracic posterior fascicle" EXACT
    "SN" BROAD
Secondary IDs
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VFB:FBbt_00002125