Abstract
Early studies often were made with the assumption that marsupials are fundamentally more primitive than eutherian mammals. Findings, however, show more similarities than differences and the differences do not always indicate two levels of evolutionary advancement but sometimes just different ways of dealing with the same biological problem. Current thought now tends to regard marsupials as representing an alternative rather than an inferior path in evolution. Among marsupials themselves there are marked differences related to the wide adaptive radiation they have undergone (see Wood Jones, 1923; Sharman, 1959a; Troughton, 1959), and they show a range of degrees of specialisation in various aspects of their morphology.
Dr Robert A. Barbour graduated M.B., B.S. from the University of Adelaide in 1955 and M.D. in 1962. Since 1956 he has been on the staff of the Adelaide Department of Anatomy and Histology, where he is now a senior lecturer and teaches histology and gross anatomy: during two sabbatical years, spent mainly in England, he studied electron microscopy and histochemistry. He has worked in the field of marsupial anatomy at both gross and microscopic levels and his current research interest is in the histology of endocrine and salivary glands.
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Barbour, R.A. (1977). Anatomy of marsupials. In: Stonehouse, B., Gilmore, D. (eds) The Biology of Marsupials. Studies in Biology, Economy and Society. Palgrave, London. https://doi.org/10.1007/978-1-349-02721-7_15
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