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Dianulites (Trepostomata, Bryozoa) from the Early Ordovician of Severnaya Zemlya, Arctic Russia

Published online by Cambridge University Press:  05 June 2013

Institut für Geowissenschaften der Christian-Albrechts-Universität zu Kiel, Ludewig-Meyn-Str. 10, D-24118 Kiel, Germany
CASP, University of Cambridge, West Building, 181a Huntingdon Road, Cambridge, CB3 0DH, UK
Institut für Erdwissenschaften, Universität Graz, Heinrichstraße 26, A-8010 Graz, Austria
Institute of Precambrian Geology & Geochronology, Russian Academy of Sciences, Makarova 2, St Petersburg, 199034, Russia
CASP, University of Cambridge, West Building, 181a Huntingdon Road, Cambridge, CB3 0DH, UK SCANDIZ, SE-74695, Skokloster, Sweden
Author for correspondence:


Trepostome bryozoan Dianulites borealis Astrova, 1965, the earliest known member of this genus, has been identified from the Early Ordovician of Severnaya Zemlya, Arctic Russia. This species developed hemispherical colonies which indicate that it lived on a relatively soft substrate with moderately low rates of sedimentation and erosion. The new record from Severnaya Zemlya expands the palaeogeographical distribution of Dianulites, known before from the Early Ordovician of Novaya Zemlya, Arctic Russia.

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