FB2026_03 , released September 17, 2026
CV Term Report
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Term head segmentation ID (Ontology) GO:0035287 (Gene Ontology)
Definition Partitioning the insect head anlage into a fixed number of segmental units. The number of segments composing the insect head has long been a subject of debate, but it is generally agreed that there are 6 or 7 segments. From anterior to posterior the head segments are the procephalic segments (labral, (ocular), antennal and intercalary) and the gnathal segments (mandibular, maxillary and labial).[ PubMed:10477305 PubMed:7915837 ]
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Genes (FBgn)GO_BIOLOGICAL_PROCESS
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 head segmentation (all annotations which use CV term, excluding "NOT" statements)
     involved_in | head segmentation
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multicellular organism development
 |__pattern specification process___________________
embryonic pattern specification                     |
 |__blastoderm segmentation_________________________|
multicellular organismal process                    |
 |__pattern specification process___________________|
segmentation                                        |
 |__blastoderm segmentation_________________________|
animal gross anatomical part developmental process  |
 |__head development________________________________|
                                                    head segmentation  21 rec.
                                                     |__anterior head segmentation 8 rec.
                                                     |   |__specification of segmental identity, antennal segment 2 rec.
                                                     |   |__specification of segmental identity, intercalary segment 1 rec.
                                                     |__posterior head segmentation 13 rec.
                                                     |   |__specification of segmental identity, labial segment 2 rec.
                                                     |   |__specification of segmental identity, mandibular segment
                                                     |   |__specification of segmental identity, maxillary segment 2 rec.
                                                     |__specification of segmental identity, head 11 rec.
                                                         |__specification of segmental identity, antennal segment 2 rec.
                                                         |__specification of segmental identity, intercalary segment 1 rec.
                                                         |__specification of segmental identity, labial segment 2 rec.
                                                         |__specification of segmental identity, mandibular segment
                                                         |__specification of segmental identity, maxillary segment 2 rec.
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Is a pattern specification process
Part of blastoderm segmentation
head development
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