Abstract

The Bivalvia genera Ctenodonta, Dualina? and Sibirinka have been identified from the Silurian Telychian Stage, Llandovery Series of Severnaya Zemlya, Arctic Russia. This is the second record of the earliest epibyssate pteriomorphs previously reported from Siberia; they flourished later in the basins of central and southern Europe. Their distribution is consistent with surface ocean currents carrying abundant cephalopods, whose accumulation on the bottom surface together with ocean current activity represented a favourable environment for epibyssate bivalves.

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