Wallace line

1859

Wallace line

The book of science

Tom Sharp

Alfred Russel Wallace oceanography biogeography

Wallace line

Wallacea

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.

See also in The book of science:

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