Wallace line

1859 Wallace line

The book of science

Tom Sharp

Alfred Russel Wallace oceanography biogeography Wallace line

Wallace line


Crossing waters

Wallace’s line defines the north-western boundary of Wallacea; Lydekker’s line defines the south-eastern boundary. Then there’s Webber’s line, which parallels Lydekker’s line and provides an alternative to Wallace’s line, below which the mammalian fauna is exclusively Australasian.

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