that the aposematic traits may be specific to the mainland population and evolved during its isolation in the Fennoscandian refugium. An evaluation of the study later in the year by the American Society of Mammalogists stated that the Novaya Zemlya lemming likely represented a population of L. sibiricus with mtDNA introgression from L. lemmus, and thus concluded that pending further research, it would be best to include the Novaya Zemlya lemming within L. sibiricus. Gallery References External links Tundra Animals species profile Boreal Forest species profile Nature in Finland-ex Virtual Finland-2007-archived in Wayback Machine. America Zoo species profile article by Nils Christian Stenseth on the regular population cycles seen in lemmings and other northern rodents Lemmus Fauna of Scandinavia Rodents of Europe Mammals described in 1758 Taxa named by Carl Linnaeus