FB2025_05 , released December 11, 2025
FB2025_05 , released December 11, 2025
CV Term Report
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General Information
Term mesonotum ID (Ontology) FBbt:00004580 (Fly Anatomy)
Definition Dorsal part of the external adult mesothorax. It is composed of four partially fused regions, the prescutum, scutum, scutellum and postnotum (Fabian et al., 2016).[ FlyBase:FBrf0037040 FlyBase:FBrf0233988 ]
Also Known As "alinotum" ; "mesothoracic notum" ; "mesothoracic tergum"
Comment Sometimes referred to as the notum. Strictly, notum refers to the upper part (tergum) of a thoracic segment (McAlpine, 1981), so there are 3 nota; the pro-, meso- and meta-notum.
Links to External Ontologies
Annotations
Records annotated with this term OR any of its CHILD TERMS
Records annotated with this exact term (annotations to child terms are NOT included)
Data Class Field Records
Alleles (FBal)  PHENOTYPE_MANIFEST_IN    1705
Insertions (FBti)  EXPRESSION_STAGE_TISSUE_POSITION      13
Insertions (FBti)  PHENOTYPE_MANIFEST_IN      40
Constructs (FBtp)  PHENOTYPE_MANIFEST_IN    1571
show Full annotation statements including this term (annotations to child terms are NOT included), and relevant FlyBase records
 Full annotation statements 
Relevant FlyBase reports
 Alleles Genes Images Insertions Constructs
 mesonotum (all annotations which use CV term, excluding "NOT" statements)    1706     15      3     53   1580
     mesonotum | adult stage       5       --       --       --       3
     mesonotum | adult stage | ectopic       4       --       --       --       4
     mesonotum | adult stage | somatic clone       4       --       --       --       --
     mesonotum | cell autonomous | ectopic | somatic clone       2       --       --       --       2
     mesonotum | cell autonomous | pupal stage | somatic clone       2       --       --       --       --
     mesonotum | cell non-autonomous | pupal stage | somatic clone       1       --       --       --       2
     mesonotum | cold sensitive       3       --       --       --       --
     mesonotum | dorsal       2       --       --       --       2
     mesonotum | ectopic      29       --       --       3     12
     mesonotum | ectopic | cold sensitive       2       --       --       --       --
     mesonotum | ectopic | larval stage | somatic clone       2       --       --       --       3
     mesonotum | heat sensitive       8       --       --       1      5
     mesonotum | lateral       2       --       --       --       1
     mesonotum | lateral | somatic clone       2       --       --       --       2
     mesonotum | medial       2       --       --       --       1
     mesonotum | medial | somatic clone       1       --       --       --       --
     mesonotum | P-stage       4       --       --       --       1
     mesonotum | P-stage | somatic clone       3       --       --       1       --
     mesonotum | pharate adult stage       5       --       --       2       --
     mesonotum | pharate adult stage | somatic clone       2       --       --       --       1
     mesonotum | posterior       3       --       --       1      1
     mesonotum | pupal stage | somatic clone       7       --       --       1      6
     mesonotum | somatic clone      35       --       --       1      9
     mesonotum | temperature conditional       2       --       --       1       --
Spanning Tree (Parents/Children)
Only view relationship:
adult mesothoracic segment
 |__adult external mesothorax______________
adult external thorax                      |
 |__notum__________________________________|
 |__adult external mesothorax______________|
region of integument                       |
 |__notum__________________________________|
segmental subdivision of adult integument  |
 |__adult external mesothorax______________|
                                           mesonotum  5088 rec.
                                            |__bristle of mesothoracic tergum 1405 rec.
                                            |   |__acrostichal bristle 28 rec.
                                            |   |__dorsocentral bristle(+) 463 rec.
                                            |   |__notopleural bristle(+) 90 rec.
                                            |   |__postalar bristle(+) 117 rec.
                                            |   |__presutural bristle 53 rec.
                                            |   |__scutellar bristle(+) 1129 rec.
                                            |   |__supraalar bristle(+) 103 rec.
                                            |__intrascutal suture 4 rec.
                                            |__mesothoracic laterotergite 5 rec.
                                            |__mesothoracic mediotergite
                                            |__mesothoracic postnotum 21 rec.
                                            |__notal microchaeta 59 rec.
                                            |__notal wing process 10 rec.
                                            |   |__anterior notal wing process(+) 10 rec.
                                            |   |__posterior notal wing process 9 rec.
                                            |__prescutal suture 3 rec.
                                            |__prescutum 119 rec.
                                            |   |__notopleural bristle(+) 90 rec.
                                            |   |__presutural bristle 53 rec.
                                            |__scutellum 1368 rec.
                                            |   |__scutellar bristle(+) 1129 rec.
                                            |__scutoscutellar suture 6 rec.
                                            |__scutum 744 rec.
                                            |   |__acrostichal bristle 28 rec.
                                            |   |__dorsocentral bristle(+) 463 rec.
                                            |   |__postalar bristle(+) 117 rec.
                                            |   |__supraalar bristle(+) 103 rec.
                                            |__trident 41 rec.
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Is a notum
Develops from mesothoracic tergum primordium
Part of adult external mesothorax
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Synonyms
Secondary IDs
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UBERON:6004580