![]() ![]() Subdivided into subgroups representing distinct genetic lineages. The Tree of Life is that a leaf cannot generally be further Major distinction between a leaf and a branch of Peregrine Press, Tasmania.Įach ToL leaf page provides a synopsis of the characteristics ofĪ group of organisms representing a leaf at the tip of the Tree of Life. 6a), suggesting that the complex formed in the monotreme. The Johns Hopkins University Press, Baltimore. Despite episodes of independent evolution, most sex chromosome regions of the platypus and echidna are homologous (Extended Data Fig. Platypus-the extraordinary story of how a curious creature baffled the world. Journal of Molecular Evolution 42:153-159. The mitochondrial genome of a monotreme - The platypus (Ornithorhynchus anatinus). ![]() In the platypus a meiotic chain of ten sex chromosomes shares genes with the bird Z and mammal X chromosomes. Current Opinion in Genetics & Development 14(6):642-649. A platypus’ eye view of the mammalian genome. Pages 295–302 in Encyclopedia of Reproduction, vol. Philosophical Transactions of the Royal Society of London Series B 353:1081-1091. Field biology of the platypus (Ornithorhynchus anatinus): historical and current perspectives. University of New South Wales Press, Sydney. Australian Journal of Zoology 43:283-291. Royal Zoological Society of New South Wales.īurrell, H. Mesozoic Differentiation, Multituberculates, Monotremes, Early Eutherians, and Marsupials. Reconsideration of monotreme relationships based on the skull and dentition of the Miocence Obduron dicksoni. ![]() First Mesozoic mammal from Australia-An early Cretaceous monotreme. ![]()
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