Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
Comparative analysis of gene expression patterns in the arthropod labrum and the onychophoran frontal appendages, and its implications for the arthropod head problem
Uppsala University, Disciplinary Domain of Science and Technology, Earth Sciences, Department of Earth Sciences, Palaeobiology.
2017 (English)In: EvoDevo, ISSN 2041-9139, E-ISSN 2041-9139, Vol. 8, article id 1Article in journal (Refereed) Published
Abstract [en]

The arthropod head problem has troubled scientists for more than a century. The segmental composition of the arthropod head, homology of its appendages, and especially the nature of the most anterior region of the head are still, at least partially, unclear. One morphological feature of the head that is in the center of current debate is the labrum (upper lip), a fleshy appendicular structure that covers the arthropod mouth. One hypothesis is that the labrum represents a fused pair of protocerebral limbs that likely are homologous with the frontal appendages (primary antennae) of extant onychophorans and the so-called great appendages of stem arthropods. Recently, this hypothesis obtained additional support through genetic data, showing that six3, an anterior-specific gene, is exclusively expressed in the arthropod labrum and the onychophoran frontal appendages, providing an additional line of evidence for homology. Here I present data that put this finding into perspective. The outcome of my study shows that the homologization of a morphological structure by the expression of a single genetic factor is potentially misleading.

Place, publisher, year, edition, pages
2017. Vol. 8, article id 1
Keywords [en]
Arthropod head problem, Onychophora, Arthropoda, Labrum, Evolution
National Category
Evolutionary Biology
Identifiers
URN: urn:nbn:se:uu:diva-315059DOI: 10.1186/s13227-016-0064-4ISI: 000391623700001PubMedID: 28053697OAI: oai:DiVA.org:uu-315059DiVA, id: diva2:1079508
Funder
Swedish Research CouncilAvailable from: 2017-03-08 Created: 2017-03-08 Last updated: 2017-11-29Bibliographically approved

Open Access in DiVA

fulltext(1559 kB)114 downloads
File information
File name FULLTEXT01.pdfFile size 1559 kBChecksum SHA-512
714f6caaac4cbb09c07e767c46fefd5f7024c2c610f7321850354d1517e385bfc5fc125ef1616847fe7156e6ad7285ca2e1c224a00f73c267614da1744f25f81
Type fulltextMimetype application/pdf

Other links

Publisher's full textPubMed

Search in DiVA

By author/editor
Janssen, Ralf
By organisation
Palaeobiology
In the same journal
EvoDevo
Evolutionary Biology

Search outside of DiVA

GoogleGoogle Scholar
Total: 114 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

doi
pubmed
urn-nbn

Altmetric score

doi
pubmed
urn-nbn
Total: 405 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf