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A polymorphic graptolite from concealed Tremadoc rocks of England
Published online by Cambridge University Press: 01 May 2009
Summary
Abundant specimens from the middle or upper Tremadoc beds in the Napton Fields Borehole, Warwickshire, are referred to one variable species, Kiaerograptus? quasimodo sp.nov. Two-stiped forms typical of Kiaerograptus co-exist with ‘one-stiped’ forms in which the first stipe consists only of Th 11. Rare specimens with three primary thecae gave rise to forms with one, two? or three stipes.
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