FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term adult mesothoracic leg nerve ID (Ontology) FBbt:00004063 (Fly Anatomy)
Definition A nerve that arises from a ventral protuberance on the adult mesothoracic neuromere (Power, 1948; Court et al., 2020). It splits at its base, with a small number of fibers innervating a ventral muscle that is posterior-lateral to the tergal depressor of the trochanter and the rest projecting into the mesothoracic leg (Power, 1948; Court et al., 2020).[ FlyBase:FBrf0007196 FlyBase:FBrf0246815 ]
Also Known As"MesoLN" ; "second leg nerve" ; "second ventral nerve" (for all, see Synonyms field below)
CommentThis might sensibly be treated as two nerves sharing a root (see Power, 1948).
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VFB:FBbt_00004063
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 adult mesothoracic leg nerve (all annotations which use CV term, excluding "NOT" statements)
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mesothoracic segment
 |__mesothoracic nerve_______________
 |__adult mesothoracic segment_______|
adult thoracic segment               |
 |__adult mesothoracic segment_______|
 |__adult leg nerve__________________|
adult nervous system                 |
 |__adult peripheral nervous system__|
 |__adult leg nerve__________________|
peripheral nervous system            |
 |__adult peripheral nervous system__|
nerve                                |
 |__mesothoracic nerve_______________|
 |__adult leg nerve__________________|
                                     adult mesothoracic leg nerve  1 rec.
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Is a mesothoracic nerve
adult leg nerve
Part of adult mesothoracic segment
adult peripheral nervous system
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VFB:FBbt_00004063