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Obdurodon is a extinct monotreme genus. Obdurodon differed from modern Platypuses in that it still had teeth (except for juveniles, the modern platypus does not have teeth).
- Archer, et al. "Description of the skull and non-vestigial dentition of a Miocene platypus (Obdurodon dicksoni) from Riversleigh, Australia, and the problem of monotreme origins".
- Augee, M.L. "Platypus and Echidnas". Royal Zoological Society of New South Wales. 1992. Pages 15–27. (O. dicksoni).
- Pascual, et al. "First discovery of monotremes in South America". Nature 356 (1992), Pages 704-706 (Monotrematum).
- Woodburne and Tedford. "The first Tertiary Monotreme from Australia." American Museum. Novitates Number 2588. 1975. Pages 1–11. (O. insignis).