Wallace's Line

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Wal·lace's Line

 (wŏl′ĭ-sĭz) or Wal·lace Line (wŏl′ĭs)
A hypothetical line separating the Oriental and Australasian biogeographic regions and passing between the islands of Borneo and Sulawesi in the north and Bali and Lombok in the south.

[After Alfred Russell Wallace.]

Wallace's line

(Biology) the hypothetical boundary between the Oriental and Australasian zoogeographical regions, which runs between the Indonesian islands of Bali and Lombok, through the Macassar Strait, and SE of the Philippines
[C20: named after Alfred Russel Wallace]
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Tenders are invited for Spl Repair To Or Md Accn Bldg No P-129 Jak Rrc,136 And 137 Wallace Line, 1 Stc Under Ge West Jabalpur
And so Mike Morwood and Penny van Oosterzee take us on a journey of discovery through the islands of Indonesia, describing along the way SE Asia's place in human evolution, culminating with the discovery of the Hobbit on the relatively small and isolated island of Flores, across the Wallace Line.
His observations on the marked faunal differences across a narrow zone led to his hypothesis of a zoological boundary now known as the Wallace Line.