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The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.


  • Gregory, W.K. 1947. The monotremes and the palimpsest theory. Bull. Am. Mus. Nat. Hist. 88, 1-52. Available from
  • Hugall, A.F., R. Foster and M.S.Y. Lee, 2007. Calibration Choice, Rate Smoothing, and the Pattern of Tetrapod Diversification According to the Long Nuclear Gene RAG-1. Systematic Biology 56(4):543-563.
  • Janke, A., X. Xu, and U. Arnason, 1997. The complete mitochondrial genome of the wallaroo (Macropus robustus) and the phylogenetic relationship among Monotremata, Marsupialia, and Eutheria. PNAS 94(4):1276-1281.
  • Killian, J.C, T.R. Buckley, N. Stewart, B.L. Munday, R.L. Jirtle, 2001. Marsupials and eutherians reunited: genetic evidence for the Theria hypothesis of mammalian evolution. Mammalian Genome 12: 513-517.
  • Kirsch J.A.W. and G.C. Mayer G.C. 1988. The platypus is not a rodent: DNA hybridization, amniote phylogeny and the palimpsest theory. Philos. Trans. R. Soc. Lond. Biol. Sci. 353, 1221-1237.
  • Luo, Z-X, R.L. Cifelli, Z. Kielan-Jaworowska, 2001. Dual origins of the tribosphenic mammals. Nature 409, 53-57.
  • Simpson, George Gaylord. 1945. The principles of classification and a classification of mammals. Bulletin of the American Museum of Natural History, vol. 85. xvi + 350
  • WoRMS (2015). Theria. Accessed through: World Register of Marine Species at


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