FB2026_03 , released September 17, 2026
CV Term Report
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General Information
Term mesothoracic segment ID (Ontology) FBbt:00000018 (Fly Anatomy)
Definition The second (middle) segment of the thorax.
Comment
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Data ClassFieldDirect annotations
Alleles (FBal)PHENOTYPE_MANIFEST_IN
Insertions (FBti)PHENOTYPE_MANIFEST_IN
Constructs (FBtp)PHENOTYPE_MANIFEST_IN
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 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Insertions Constructs
 mesothoracic segment (all annotations which use CV term, excluding "NOT" statements)
     mesothoracic segment | cell autonomous
      --       --       --
     mesothoracic segment | cell autonomous | somatic clone
      --       --       --
     mesothoracic segment | ectopic
      --       --       --
     mesothoracic segment | embryonic stage | heat sensitive
      --       --
     mesothoracic segment | heat sensitive
      --       --
     mesothoracic segment | somatic clone
      --       --       --
     mesothoracic segment | ventral
      --       --
Spanning Tree (Parents/Children)
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segment__
thorax___|
         thoracic segment
          |__mesothoracic segment  25400 rec.
              |__adult mesothoracic segment 22755 rec.
              |   |__adult anterior dorsal mesothoracic nerve 2 rec.
              |   |__adult external mesothorax(+) 5209 rec.
              |   |__adult mesothoracic accessory nerve 1 rec.
              |   |__adult mesothoracic leg nerve 1 rec.
              |   |__adult mesothoracic neuromere(+) 27 rec.
              |   |__adult mesothoracic segment anterior compartment 3 rec.
              |   |__adult mesothoracic segment posterior compartment 8 rec.
              |   |__adult mesothoracic sensillum(+) 2510 rec.
              |   |__adult posterior dorsal mesothoracic nerve 1 rec.
              |   |__mesothoracic leg(+) 372 rec.
              |   |__mesothoracic postnotal ridge
              |   |__scutellar pulsatile organ 7 rec.
              |   |__somatic muscle of mesothorax(+) 1588 rec.
              |   |__wing(+) 17448 rec.
              |   |__wing nerve(+) 128 rec.
              |__embryonic mesothoracic segment 208 rec.
              |   |__dorsal mesothoracic disc primordium 11 rec.
              |   |__embryonic mesothoracic neuromere 1 rec.
              |   |__mesothoracic tracheal primordium(+) 24 rec.
              |   |__ventral mesothoracic disc primordium 3 rec.
              |__larval mesothoracic segment 4215 rec.
              |   |__adepithelial cell of mesothoracic leg disc 3 rec.
              |   |__adepithelial cell of wing disc(+) 44 rec.
              |   |__hypodermal muscle of mesothorax(+) 50 rec.
              |   |__integument of larval mesothoracic segment
              |   |__larval mesothoracic dorsal sensory cluster(+) 17 rec.
              |   |__larval mesothoracic intersegmental nerve 15 rec.
              |   |__larval mesothoracic lateral sensory cluster(+) 4 rec.
              |   |__larval mesothoracic neuromere(+) 3 rec.
              |   |__larval mesothoracic segmental nerve 5 rec.
              |   |__larval mesothoracic sensillum(+) 5 rec.
              |   |__larval mesothoracic ventral sensory cluster group(+) 5 rec.
              |   |__mesothoracic dorsal trichome 6 rec.
              |   |__mesothoracic leg disc(+) 58 rec.
              |   |__mesothoracic ventral denticle belt 43 rec.
              |   |__wing disc(+) 4034 rec.
              |__mesothoracic nerve 157 rec.
              |   |__adult anterior dorsal mesothoracic nerve 2 rec.
              |   |__adult mesothoracic accessory nerve 1 rec.
              |   |__adult mesothoracic leg nerve 1 rec.
              |   |__adult posterior dorsal mesothoracic nerve 1 rec.
              |   |__larval mesothoracic intersegmental nerve 15 rec.
              |   |__larval mesothoracic segmental nerve 5 rec.
              |   |__wing nerve(+) 128 rec.
              |__mesothoracic neuroblast NB3-5 1 rec.
              |__mesothoracic neuroblast NB5-2
              |__mesothoracic neuroblast NB5-3
              |__mesothoracic neuroblast NB7-2
              |__mesothoracic neuromere 37 rec.
              |   |__adult mesothoracic neuromere(+) 27 rec.
              |   |__embryonic mesothoracic neuromere 1 rec.
              |   |__larval mesothoracic neuromere(+) 3 rec.
              |__mesothoracic pretarsus 6 rec.
              |   |__mesothoracic auxilia
              |   |__mesothoracic empodium
              |   |__mesothoracic pulvillar membrane
              |   |__mesothoracic pulvillus(+)
              |   |__mesothoracic unguis(+) 6 rec.
              |   |__mesothoracic unguitractor plate
              |   |__mesothoracic ungulfus
              |__mesothoracic segment anterior compartment 2 rec.
              |__mesothoracic segment posterior compartment 2 rec.
              |__mesothoracic suture 64 rec.
                  |__intrascutal suture 4 rec.
                  |__mesothoracic cleft(+) 23 rec.
                  |__notopleural suture 3 rec.
                  |__pleural suture 5 rec.
                  |__prescutal suture 3 rec.
                  |__scutoscutellar suture 8 rec.
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Is a thoracic segment
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Synonyms
  • "mesothorax" RELATED
    "t2" RELATED
    "thoracic segment 2" RELATED
Secondary IDs
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UBERON:6000018