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XIII.—On the Structure of Deltasperma fouldenense gen. et sp. nov., and Camptosperma berniciense gen. et sp. nov., petrified 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

Two new species of fossil seeds are described from the Cementstone Group of Berwickshire. Deltasperma fouldenense is asymmetrically platyspermic, and has large superficial cells chiefly on the more convex side. It is orthotropous but shows no pedicel. Camptosperma berniciense is campylotropous and has a dense integument. A vascular bundle to the chalaza ends at the nucellus base.

Both seeds possess a similar lagenostome and short salpinx; two integumental bundles which expand in the free lobes; a female prothallus with a wide “tent-pole” and about two archegonia; a nucellus adnate to the integument below the lagenostome; and spherical pollen grains in the pollen chamber. The seeds show most affinity with the Lagenostomales.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 64 , Issue 13: 1959-1960 On the Structure of “Deltasperma Fouldenense” Gen. Et SP. Nov., and “Camptosperma Berniciense” Gen. ER SP. Nov., Petrified Seeds from the Calciferous Sandstone Series of Berwickshire , 1961 , pp. 281 - 295
Copyright
Copyright © Royal Society of Edinburgh 1960

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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

Barnard, P. D. W., 1959. “On Eosperma oxroadense gen. et sp. nov.: a New Lower Carboniferous Seed from East Lothian”, Ann. Bot., 23, 285–296.Google Scholar
Holden, H. S., 1954. “The Morphology of a New Species of Pteridosperm Seed from the Yorkshire Coal Measures”, Ann. Bot., 18, 407–415.Google Scholar
Long, A. G., 1944. “On the Prothallus of Lagenostoma ovoides Will.”, Ann. Bot., 8, 105–117.Google Scholar
Oliver, F. W., and Salisbury, E. J., 1911. “On the Structure and Affinities of the Palæozoic Seeds of the Conostoma Group”, Ann. Bot., 25, 1.Google Scholar