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Fossilized nuclei and chromosomes reveal 180 millionyears of genomic stasis in Royal Ferns
Swedish Museum of Natural History, Department of Paleobiology.
Swedish Museum of Natural History, Department of Paleobiology.ORCID iD: 0000-0001-6723-239X
Lund University.
2014 (English)In: Science, ISSN ISSN 0036-8075, Vol. 343, 1376-1377 p.Article in journal (Refereed) Published
Abstract [en]

Rapidly permineralized fossils can provide exceptional insights into the evolution of life over geological time. Here, we present an exquisitely preserved, calcified stem of a royal fern (Osmundaceae) from Early Jurassic lahar deposits of Sweden in which authigenic mineral precipitation from hydrothermal brines occurred so rapidly that it preserved cytoplasm, cytosol granules, nuclei, and even chromosomes in various stages of cell division. Morphometric parameters of interphase nuclei match those of extant Osmundaceae, indicating that the genome size of these reputed “living fossils” has remained unchanged over at least 180 million years—a paramount example of evolutionary stasis.

Place, publisher, year, edition, pages
2014. Vol. 343, 1376-1377 p.
Keyword [en]
Fossilization; permineralization; Early Jurassic; palynology; organelles
National Category
Natural Sciences
Research subject
The changing Earth
URN: urn:nbn:se:nrm:diva-315DOI: 10.1126/science.1249884OAI: diva2:719316
Swedish Research Council, 2010-3931
Available from: 2014-05-23 Created: 2014-05-23 Last updated: 2015-12-02Bibliographically approved

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Bomfleur, BenjaminMcLoughlin, StephenVajda, Vivi
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