Technical Comments

Comment on “An Update of Wallace’s Zoogeographic Regions of the World”

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Science  26 Jul 2013:
Vol. 341, Issue 6144, pp. 343
DOI: 10.1126/science.1237471

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Holt et al. (Report, 4 January 2013, p. 74) propose substantial modifications of Wallace’s long-standing zoogeographic regions based on clustering of a pairwise similarity matrix of vertebrate assemblages. We worry about their compromised use of phylogenies and show that a fundamental point of their analysis—i.e., the delineation of new realms—is only weakly supported by their results and conceptually flawed.

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