Biogeochemical evidence for the presence of the angiosperm molecular fossil oleanane in Paleozoic and Mesozoic non-angiospermous fossils

@inproceedings{Taylor2006BiogeochemicalEF,
  title={Biogeochemical evidence for the presence of the angiosperm molecular fossil oleanane in Paleozoic and Mesozoic non-angiospermous fossils},
  author={David Winship Taylor and Hongqing Li and Jeremy E P Dahl and Frederick J. Fago and David A. Zinniker and J. Michael Moldowan},
  booktitle={Paleobiology},
  year={2006}
}
Abstract Recent molecular phylogenetic and molecular clock data both suggest a pre-Mesozoic age for the divergence of the angiosperm lineage from other seed plants, greatly predating the confirmed fossil record of the angiosperm crown group. In addition, molecular phylogenetic studies have not supported the morphologically based conclusion that gnetophytes are the extant sister group to angiosperms. We examine these relationships and divergence ages by using a novel approach of examining the… 
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    International Journal of Plant Sciences
  • 2008
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TLDR
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TLDR
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TLDR
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To help resolve current controversies surrounding the fundamental question of synchrony between end-Permian mass extinction on land and in the sea, we examined the marine Permian–Triassic reference
A New Genus of Gigantopterid from the Middle Permian of the United States and China and Its Relevance to the Gigantopterid Concept
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It is argued that leaf venation should not be given primacy over all other characteristics when assessing gigantopterid relationships and therefore as a basis for taxonomy.
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