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Brief Communication Arising
Nature 458, E5 (19 March 2009) | doi:10.1038/nature07775
There is a Brief Communication Arising (19 March 2009) associated with this document.
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Thewissen et al. reply
J. G. M. Thewissen1, Lisa Noelle Cooper1,2, Mark T. Clementz3, Sunil Bajpai4 & B. N. Tiwari5
Abstract
Replying to: J. H. Geisler & J. M. Theodor Nature 458, 10.1038/nature07776 (2009)
The analysis of Geisler and Theodor1 confirms our main phylogenetic result2, that raoellids are, or include, the sister group to cetaceans. Their study expands on our findings by inferring that hippopotamids are the sister group to the combined raoellid–cetacean clade, whereas our paper had explicitly stated that our data could not address the position of the extant artiodactyl families.
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