... References Download PDF . Taxonomy and distribution of the pikas ( Ochotona , Lagomorpha) of alpina-hyperborea group in North-East China and adjacent territories . ... The taxonomy and phylogeography of Palaearctic true lemmings ( Lemmus , Cricetidae, Rodentia): New insights from cyt b data . ... We also examined the historical demography of the clades using stepwise and exponential expansion models, both of which indicated recent rapid population growth. ...