The Laptev Sea walrus Odobenus rosmarus laptevi: an enigma revisited

@article{Lindqvist2009TheLS,
  title={The Laptev Sea walrus Odobenus rosmarus laptevi: an enigma revisited},
  author={Charlotte Lindqvist and Lutz Bachmann and Liselotte Wesley Andersen and Erik W. Born and {\'U}lfur {\'A}rnason and Kit M. Kovacs and Christian Lydersen and Alexei V. Abramov and {\O}ystein Wiig},
  journal={Zoologica Scripta},
  year={2009},
  volume={38}
}
The walrus (Odobenus rosmarus) is in some current systematic schemes divided into three subspecies: O. r. rosmarus in the North Atlantic, O. r. divergens in the North Pacific and O. r. laptevi in the Laptev Sea. These three subspecies have been described as differing in body size, but the taxonomic status of O. r. laptevi is disputed. The current study applies molecular and morphometric methods to assess the taxonomic status of O. r. laptevi and to analyse the systematic and phylogeographic… 
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Morphologic and genetic criteria used to recognize pinniped species and subspecies are evaluated individually for all taxa in the three families: Otariidae (sea lions and fur seals), Odobenidae (walruses) and Phocidae (seals).
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At a small-scale phylo-geographical level, the mtDNA data indicated that Atlantic walruses have diverged into two major groups: one northwest and one east of Greenland, whereas the haplotype distribution in the West Greenland sample reflected a mixture of both these groups.
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