References Associated with Penguin Phylogeny Activity

1. Watanabe M, Nikaido M, Tsuda TT, et al. New candidate species most closely related to penguins. Gene. 2006;378:65-73.  

2. Tuinenf MV, Butvill DB, Kirsch JAW, Hedges SB. Convergence and divergence in the evolution of aquatic birds. Proceedings of the Royal Society of London. Series B: Biological Sciences. 2001;268(1474):1345-1350.  

3. Baker AJ, Pereira SL, Haddrath OP, Edge K. Multiple gene evidence for expansion of extant penguins out of Antarctica due to global cooling. Proceedings of the Royal Society B: Biological Sciences. 2006;273(1582):11-17.  

4. Clarke JA, Ksepka DT, Stucchi M, et al. Paleogene equatorial penguins challenge the proposed relationship between biogeography, diversity, and Cenozoic climate change. Proceedings of the National Academy of Sciences. 2007;104(28):11545-11550.  

5. Boessenkool S, Austin JJ, Worthy TH, et al. Relict or colonizer? Extinction and range expansion of penguins in southern New Zealand. Proceedings of the Royal Society B: Biological Sciences. 2009;276(1658):815-821.