Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Experiment Videos

Developmental genetics and arthropod evolution: part 1, on legs.

F R Schram1, S Koenemann

  • 1Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam, Netherland. schram@science.uva.nl

Evolution & Development
|November 17, 2001
PubMed
Summary

Developmental genetics challenges crustacean evolution theories, suggesting limb formation models differ from fossil interpretations. Further phylogenetic studies are crucial for understanding arthropod evolution and limb development.

Related Concept Videos

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

The origin of crustacean biramous appendages and the evolution of arthropoda.

Science (New York, N.Y.)·1990
Same author

Isopod from the Pennsylvanian of Illinois.

Science (New York, N.Y.)·1970
See all related articles

Area of Science:

  • Evolutionary Biology
  • Developmental Genetics
  • Paleontology

Background:

  • Arthropod evolution theories rely on fossil anatomy and developmental pathways.
  • Understanding limb ontogeny is key to evaluating evolutionary scenarios.

Purpose of the Study:

  • To re-evaluate arthropod evolution scenarios using developmental genetic data.
  • To investigate the evolution of crustacean limbs and arthropod segmentation.

Main Methods:

  • Analysis of genetic expression cascades controlling arthropod limb development.
  • Comparison of developmental models across extant and fossil arthropods.
  • Examination of fossil anatomy (Orsten and Rhynie Chert material).

Main Results:

Related Experiment Videos

  • Developmental genetics suggests the crustacean coxa may not have evolved from a proximal endite.
  • Three distinct arthropod limb formation models indicate certain fossils may not be crown-group Branchiopoda.
  • Long, multisegmented limbs could arise from mutations (e.g., Hox-gene mutations), not necessarily ancestral traits.

Conclusions:

  • Developmental genetic data necessitate caution in interpreting fossil arthropod anatomy, particularly the Orsten material.
  • Existing fossil taxa may not fit within the crown-group Branchiopoda based on limb development models.
  • Arthropod limb evolution, especially segmentation, may be driven by genetic mutations rather than solely ancestral conditions, requiring more comprehensive phylogenetic analyses.