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XII.—On the Structure of Samaropsis scotica Calder (emended) and Eurystoma angulare 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

The Lower Carboniferous seed Samaropsis scotica Calder has been re-investigated from new material and assigned to a new genus Lyrasperma. It is shown to have a nucellar apex with a pollen chamber and a funnel-like structure interpreted as an expanded salpinx. The free parts of the two integumental lobes diverge as apical horns; there is therefore no micropyle. Eurystoma angulare gen. et sp. nov. possesses a similar nucellar apex but is usually quadrangular in section and has four apical lobes. The new genera are placed in the group Lagenostomales although the expanded salpinx is a character new to that group.

Type
Research Article
Information
Earth and Environmental Science Transactions of The Royal Society of Edinburgh , Volume 64 , Issue 12: 1959-1960 On the Structure of “Samaropsis Scotica” Calder (Emended) and “Eurystoma Angulare” Gen. ET SP. Nov., Petrified Seeds from the Calciferous Sandstone Series of Berwickshire , 1960 , pp. 261 - 280
Copyright
Copyright © Royal Society of Edinburgh 1960

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