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monotreme |
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monotreme![]() A short-nosed echidna. The female develops a temporary pouch during the breeding season, into which she transfers the single egg she has laid. The egg hatches 7–10 days later. ![]() When the platypus was discovered 200 years ago, scientists thought the first specimens were fakes. It has some birdlike features, such as the duck's beak and webbed feet; it also lays eggs. The body has some reptilian characteristics, but is covered with hair like a mammal. Like a mammal, the platypus feeds its young with milk. Any of a small group of primitive egg-laying mammals, found in Australasia. They include the echidnas (spiny anteaters) and the platypus. (Order Monotremata.) In 1995 Australian palaeontologists announced a new (extinct) family of monotreme, the Kollikodontidae, following the discovery of a 120-million-year-old jawbone in New South Wales. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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| Fossils of an ancient egg-laying mammal indicate that the configuration of the bones in all living mammals' ears arose at least twice along independent evolutionary pathways, paleontologists say. The echidna and the platypus are the world's only two egg-laying mammals. A rare egg-laying mammal showed no fear of the scientists. |
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