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Brief Communication Arising
Nature 458, E1-E4 (19 March 2009) | doi:10.1038/nature07776; Received 26 March 2008; Accepted 15 October 2008
There is a Brief Communication Arising (19 March 2009) associated with this document.
There is an Article (20 December 2007) associated with this document.
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Faculty - Plant Cellular & Molecular Biology, Molecular Genetics & the Plant Molecular Biology / Biotechnology Program
- The Ohio State University
- Columbus, Ohio
Assistant Professor and Associate Professor
- Massachusetts General Hospital/ Harvard Medical School
- Charlestown, MA
Hippopotamus and whale phylogeny
Jonathan H. Geisler1 & Jessica M. Theodor2
Abstract
Arising from: J. G. M. Thewissen, L. N. Cooper, M. T. Clementz, S. Bajpai & B. N. Tiwari Nature 450, 1190–1194 (2007); Thewissen et al. reply
Thewissen et al.1 describe new fossils from India that apparently support a phylogeny that places Cetacea (that is, whales, dolphins, porpoises) as the sister group to the extinct family Raoellidae, and Hippopotamidae as more closely related to pigs and peccaries (that is, Suina) than to cetaceans. However, our reanalysis of a modified version of the data set they used2 differs in retaining molecular characters and demonstrates that Hippopotamidae is the closest extant family to Cetacea and that raoellids are the closest extinct group, consistent with previous phylogenetic studies2, 3. This topology supports the view that the aquatic adaptations in hippopotamids and cetaceans are inherited from their common ancestor4.
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