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VII.—Eurystoma trigona sp. nov., a Pteridosperm ovule borne on a frond of Alcicornopteris Kidston

Published online by Cambridge University Press:  06 July 2012

Albert G. Long
Albert G. Long
Affiliation:
Hancock Museum, Newcastle upon Tyne.
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Synopsis

Ovules of Eurystoma trigona sp. nov. are described. Over 330 unpollinated ovules were found attached to a petrified megasporophyll which appears to be a juvenile form of Alcicornopteris Kidston. Each ovule is triangular in cross section and has three wing-like extensions of the integument. None shows a female prothallus. The possibility that Alcicornopteris represents the fertile foliage of Stenomyelon is discussed.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 68 , Issue 7 , 1969 , pp. 171 - 182
Copyright
Copyright © Royal Society of Edinburgh 1969

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References

References to Literature

Kidston, R., 1883. “Report on Fossil Plants collected by the Geological Survey of Scotland in Eskdale and Liddesdale”, Trans. Roy. Soc. Edinb., 30, 531–550.CrossRefGoogle Scholar
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Long, A. G., 1960. “On the structure of Samaropsis scotica Calder (emended) and Eurystoma angulare gen. et sp. nov., Petrified Seeds from the Calciferous Sandstone Series of Berwickshire”, Trans. Roy. Soc. Edinb., 64, 261–280.CrossRefGoogle Scholar
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Long, A. G., 1965. “On the Cupule Structure of Eurystoma angulare”, Trans. Roy. Soc. Edinb., 66, 111–128.CrossRefGoogle Scholar
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