FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term larval mesothoracic intersegmental nerve ID (Ontology) FBbt:00002104 (Fly Anatomy)
Definition Larval intersegmental nerve of the mesothoracic segment. Similar to the A1-A7 nerves, it has two roots; an anterior root that is formed by neurons of the anteriorly adjacent neuromere, and a posterior root, that is formed by neurons of the same neuromere as the nerve (Campos-Ortega and Hartenstein, 1997). Proximally it shares a glial sheath with the segmental nerve (Campos-Ortega and Hartenstein, 1997). It receives a branch from the mesothoracic lateral sensory cluster (Campos-Ortega and Hartenstein, 1997). Its main trunk continues dorsally and innervates the dorsal sensory cluster and dorsal musculature (Campos-Ortega and Hartenstein, 1997).[ FlyBase:FBrf0089570 ]
Also Known As "mesothoracic anterior fascicle"
Comment
Links to External Ontologies
VFB:FBbt_00002104
Annotations
Records annotated with this term OR any of its CHILD TERMS
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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       7
Insertions (FBti)  PHENOTYPE_MANIFEST_IN       2
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN       6
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 Full annotation statements 
Relevant FlyBase reports
 Alleles Insertions Constructs
 larval mesothoracic intersegmental nerve (all annotations which use CV term, excluding "NOT" statements)       7      2      6
     larval mesothoracic intersegmental nerve | adult stage | dorsal       1      2       --
Spanning Tree (Parents/Children)
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nerve
 |__larval intersegmental nerve__
 |__mesothoracic nerve___________|
                                 larval mesothoracic intersegmental nerve  15 rec.
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Is a larval intersegmental nerve
mesothoracic nerve
Part of larval mesothoracic segment
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Synonyms
  • "ISN" BROAD
    "mesothoracic anterior fascicle" EXACT
Secondary IDs
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VFB:FBbt_00002104