6533b838fe1ef96bd12a52ad

RESEARCH PRODUCT

Expression of en and wg in the embryonic head and brain of Drosophila indicates a refolded band of seven segment remnants

Urs Schmidt-ottGerhard M. Technau

subject

Metamerism (biology)biologyfungiEmbryogenesisGene ExpressionGenes InsectEmbryoAnatomyNeuromerebiology.organism_classificationengrailedSegment polarity geneCrustaceaDrosophilidaeHead segmentationMorphogenesisAnimalsDrosophilaHeadMolecular BiologyDevelopmental Biology

description

ABSTRACT Based on the expression pattern of the segment polarity genes engrailed and wingless during the embryonic development of the larval head, we found evidence that the head of Drosophila consists of remnants of seven segments (4 pregnathal and 3 gnathal) all of which contribute cells to neuromeres in the central nervous system. Until completion of germ band retraction, the four pregnathal segment remnants and their corresponding neuromeres become arranged in an S-shape. We discuss published evidence for seven head segments and morphogenetic movements during head formation in various insects (and crustaceans).

yearjournalcountryeditionlanguage
1992-09-01Development
https://doi.org/10.1242/dev.116.1.111