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Arthropod segmentation: why centipedes are odd.

Wim G M Damen1

  • 1Institute for Genetics, Department for Evolutionary Genetics, University of Cologne, Weyertal 121, D-50931 Köln, Germany. damen@uni-koeln.de

Current Biology : CB
|July 23, 2004
PubMed
Summary
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Centipedes exhibit a unique double segmental gene expression pattern, potentially explaining their odd number of body segments. This finding suggests ancient origins for such developmental patterning in arthropods.

Area of Science:

  • Developmental Biology
  • Evolutionary Genetics
  • Arthropod Biology

Background:

  • Centipedes consistently display an odd number of trunk segments, a long-standing biological observation.
  • Recent research identified a double segmental periodicity in gene expression within centipedes.

Discussion:

  • This gene expression pattern offers a molecular mechanism for the odd segment number.
  • The study questions whether this phenomenon is unique to centipedes or a conserved trait in arthropod evolution.

Key Insights:

  • Discovery of a double segmental gene expression periodicity in centipedes.
  • Provides a potential molecular basis for the odd segment number in centipedes.
  • Suggests that double segmental pair-rule patterning may be ancient, dating back to the common ancestor of arthropods.

Related Experiment Videos

Outlook:

  • Investigating gene expression patterns in other arthropods to determine the evolutionary conservation of this trait.
  • Further research into the genetic regulatory networks controlling segmental patterning in centipedes.
  • Exploring the ancestral state of segmental development in the Ur-arthropod.