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New Lower Ordovician Brachiopods from the Llandeilo-Llangadock District

Published online by Cambridge University Press:  01 May 2009

Alwyn Williams
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Extract

External characters.—Plano-convex with a moderately deep ventral valve and a plane to slightly convex dorsal valve. Outline is semi-oval with the greatest width just anterior to the long straight hinge-line. Ventral interarea, wide, long, apsacline, dorsal interarea, anacline.

Type
Articles
Information
Geological Magazine , Volume 86 , Issue 4 , August 1949 , pp. 226 - 238
Copyright
Copyright © Cambridge University Press 1949

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References

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