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XV.—Some Pteridosperm Seeds from the Calciferous Sandstone Series of Berwickshire*

Published online by Cambridge University Press:  30 May 2017

Albert G. Long
Albert G. Long*
Affiliation:
Berwickshire High School, Duns
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Synopsis

Four new species of petrified seeds are described:

  1. 1. Eccroustosperma langtonense gen. et sp. nov.—a curved platyspermic seed with two apical lobes of the integument and a rough sclerotesta when mature.

  2. 2. Hydrasperma tenuis gen. et sp. nov.—a small slender seed with 8–10 free apical lobes and longitudinal external ridges.

  3. 3. Stamnostoma bifrons sp. nov.—a barrel-shaped seed with a nucellar apex and micropyle intermediate in form between Stamnostoma huttonense and Sphcerostoma ovale.

  4. 4. Dolichosperma sexangulatum gen. et sp. nov.—a relatively long narrow radiospermic seed with a dense sixangled integument open above and without tentacles or micropyle. The salpinx was probably funnel-shaped.

All four species are assigned to the Lagenostomales.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 64 , Issue 15: 1960-1961 Some Pteridosperm Seeds from the Calciferous Sandstone Series of Berwickshire , 1961 , pp. 401 - 419
Copyright
Copyright © Royal Society of Edinburgh 1961

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Footnotes

*

This paper was assisted in publication by a grant from the Carnegie Trust for the Universities of Scotland.

References

References to Literature

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