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Diatom Research Volume 7, 1992 - Issue 1
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Original Articles

CYCLOTELLOID SPECIES FROM A DIATOMITE IN THE HARZ MOUNTAINS, GERMANY, INCLUDING PLIOCAENICUS GEN. NOV.

F. E. Round Department of Botany, University of Bristol, Bristol, BS8 1UG, England
&
H. Håkansson Department of Quaternary Geology, University of Lund, Tornavagen 13, S-223 63, Lund, Sweden
Pages 109-125 | Published online: 31 Oct 2011
 
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Abstract

Three centric taxa are described from a diatomite deposit in the Harz mountains, Niedersachsen, Germany. The delimination of Cyclotella, Cyclostephanos and Stephanodiscus is discussed and a tighter generic circumscription proposed. Cyclotella radiosa cf. var. pliocaenica is explored and a new genus Pliocaenicus is erected together with two new species, P. hercynicus and P. undulatus. Cyclostephanos pygmaea, C. costatus, C. omarensis and C. pantocseki are also transferred to Pliocaenicus.

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