%0 Journal Article %T Intraspecific or interspecific variation: delimitation of species boundaries within the genus Gammarus (Crustacea, Amphipoda, Gammaridae), with description of four new species %A HOU, ZHONGE %A LI, SHUQIANG %J Zoological Journal of the Linnean Society %V 160 %N 2 %P 215-253 %@ 0024-4082 %D 2010-10-01 %I The Linnean Society of London %~ DeepDyve