Parasegmental appendage allocation in annelids and arthropods and the homology of parapodia and arthropodia
2008
Homology of Appendages in Annelids and Arthropods
publication
Evidence: moderate
Author Information
Author(s): Prpic Nikola-Michael
Primary Institution: Georg-August-Universität Göttingen
Hypothesis
Are the appendages of annelids and arthropods homologous structures despite their different positions in adult animals?
Conclusion
The study suggests that annelid and arthropod appendages are homologous structures that share a common evolutionary origin.
Supporting Evidence
- Gene expression patterns in the brine shrimp suggest that their limb primordia are parasegmental.
- Annelid and arthropod appendages have identical positions in immature animals.
- The study challenges the traditional view of the homology of appendages in annelids and arthropods.
Takeaway
This study found that the early stages of limb development in brine shrimp are similar to those in annelids, suggesting that both groups share a common ancestor.
Methodology
The study used gene expression analysis in the brine shrimp Artemia franciscana to investigate the development of appendages.
Digital Object Identifier (DOI)
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