Cell lineage analysis of the mandibular segment of the amphipod Orchestia cavimana reveals that the crustacean paragnaths are sternal outgrowths and not limbs
2006
Cell lineage analysis of the amphipod Orchestia cavimana reveals paragnaths are outgrowths, not limbs
publication
Evidence: high
Author Information
Author(s): Wolff Carsten, Scholtz Gerhard
Primary Institution: Humboldt-Universität zu Berlin
Hypothesis
Are the paragnaths in crustaceans derived from limbs or are they outgrowths of the sternal region?
Conclusion
The study concludes that paragnaths are sternal outgrowths of the mandibular segment, not limbs.
Supporting Evidence
- The study provides evidence that paragnaths develop from specific cell lineages in the mandibular segment.
- Cell lineage and clonal analyses were used to trace the origin of paragnaths.
- Gene expression data supports the conclusion that paragnaths are part of the mandibular segment.
Takeaway
This study looked at how certain mouth parts in a tiny crustacean develop, showing they come from a different part of the body than previously thought.
Methodology
The study used 4D-microscopy and in-vivo labeling with DiI to trace cell lineages in developing embryos.
Digital Object Identifier (DOI)
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