Molecular phylogenetics of mastodon and Tyrannosaurus rex

Submitted by Naturenomics Team on Fri, 14/10/2016 - 09:29
Abstract

 We report a molecular phylogeny for a nonavian dinosaur, extending our knowledge of trait evolution within nonavian dinosaurs into the macromolecular level of biological organization. Fragments of collagen alpha1(I) and alpha2(I) proteins extracted from fossil bones of Tyrannosaurus rex and Mammut americanum (mastodon) were analyzed with a variety of phylogenetic methods. Despite missing sequence data, the mastodon groups with elephant and the T. rex groups with birds, consistent with predictions based on genetic and morphological data for mastodon and on morphological data for T. rex. Our findings suggest that molecular data from long-extinct organisms may have the potential for resolving relationships at critical areas in the vertebrate evolutionary tree that have, so far, been phylogenetically intractable

Author

Organ, C.L., Schweitzer, M.H., Zheng, W., Freimark, L.M., Cantley, L.C., Asara, J.M., 2008. 

References

Science 320, 499.

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