Corpus ID: 30089201

ARCHAEOSPERMA ARNOLDZZ-A CUPULATE SEED FROM THE UPPER DEVONIAN O F NORTH AMERICA

@inproceedings{Pettitt2006ARCHAEOSPERMAAC,
  title={ARCHAEOSPERMA ARNOLDZZ-A CUPULATE SEED FROM THE UPPER DEVONIAN O F NORTH AMERICA},
  author={John M. Pettitt and Charles B. Beck},
  year={2006}
}
A new seed, Archaeosperma arnoldii, n. gen. and n. sp., from the Upper Devonian of North America, provides evidence for the existence of gymnospermous plants in preMississippian times. This discovery is significant in relation to the origin and evolution of the seed habit. 

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TLDR
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