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On the occurrence of Parabrograptus and Sinograptus from the Middle Ordovician of Western Canada
Published online by Cambridge University Press: 01 May 2009
Abstract
Specimens of Parabrograptus and Sinograptus from western Canada are described for the first time. An amended diagnosis of Parabrograptus is given. One pyritized fragment of a sinograptid stipe exhibits characters intermediate between Holmograptus and Sinograptus.
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