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Partitioning the 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). Partitioning the posterior region of the head anlage into gnathal (mandibular, maxillary and labial) segments. Unlike the anterior head (procephalic) segments, formation of the posterior head (gnathal) segments occurs by a similar mechanism to trunk segmentation, where a cascade of gap genes, pair-rule genes and segment-polarity genes subdivide the embryo into progressively smaller domains. The process whereby segments assume individual identities; exemplified in insects by the actions of the products of the homeotic genes. The specification of the characteristic structures of the head segments following establishment of segment boundaries. Identity is considered to be the aggregate of characteristics by which a structure is recognized. The specification of the characteristic structures of the labial segment following establishment of segment boundaries. Identity is considered to be the aggregate of characteristics by which a structure is recognized.

View Gene Ontology (GO) Term

GO TERM SUMMARY
Name: specification of segmental identity, labial segment
Acc: GO:0007381
Aspect: Biological Process
Desc: The specification of the characteristic structures of the labial segment following establishment of segment boundaries. Identity is considered to be the aggregate of characteristics by which a structure is recognized.
Proteins in PDR annotated with:
   This term: 3 [Search]
   Term or descendants: 3 [Search]


[geneontology.org]
INTERACTIVE GO GRAPH

GO:0007381 - specification of segmental identity, labial segment (interactive image map)
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