Blakiston's Line is a biogeographical boundary that distinguishes the fauna of the eastern and western parts of the Asian continent, particularly in relation to the regions of northeastern Asia and the Japanese archipelago. It was named after the British naturalist William Edward Blakiston, who first described the line in the 19th century. The line runs approximately along the Sakhalin Island, the Strait of Tartary, and the coast of northern Honshu, Japan.
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