What is the boundary that separates Sunda and Sahul called?

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The boundary that separates Sunda and Sahul is called the Wallace Line, named after the British naturalist Alfred Russel Wallace who discovered the distinct difference in flora and fauna between the two regions. The Marianas Trench is a deep oceanic trench in the Pacific Ocean. Arnhem Land is a region in Northern Australia. Beringia is a land bridge that once connected Siberia and Alaska.

What Is the Boundary That Separates Sunda and Sahul Called