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The platypus (Ornithorhynchus anatinus), [4] sometimes referred to as the duck-billed platypus, [5] is a semiaquatic, egg-laying mammal endemic to eastern Australia, including Tasmania. The platypus is the sole living representative or monotypic taxon of its family Ornithorhynchidae and genus Ornithorhynchus , though a number of related species ...
A female mallard duck incubates her eggs. Egg incubation is the process by which an egg, of oviparous (egg-laying) animals, develops an embryo within the egg, after the egg's formation and ovipositional release. Egg incubation is done under favorable environmental conditions, possibly by brooding and hatching the egg.
The platypus has an average body temperature of about 31 °C (88 °F) rather than the averages of 35 °C (95 °F) for marsupials and 37 °C (99 °F) for placentals. [ 30 ] [ 31 ] Research suggests this has been a gradual adaptation to the harsh, marginal environmental niches in which the few extant monotreme species have managed to survive ...
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They hold the eggs internally for several weeks, providing nutrients, and then lay them and cover them like birds. Like marsupial " joeys ", monotreme " puggles " are larval and fetus-like, [ 9 ] as like them they cannot expand their torso due to the presence of epipubic bones, forcing them to produce undeveloped young.
The platypus is considered to be one of the strangest specimens of the animal kingdom: a venomous, egg-laying, duck-billed mammal. When the platypus was first discovered by Europeans in the late 18th century, a pelt was sent back to Britain and presented for examination by Joseph Banks to the scientific community.
While hatching, the baby echidna opens the leather shell with a reptile-like egg tooth. [22] Hatching takes place after 10 days of gestation; the young echidna, called a puggle, [23] [24] born larval and fetus-like, then sucks milk from the pores of the two milk patches (monotremes have no teats) and remains in the pouch for 45 to 55 days, [25 ...
Billed snouts on the duck-billed dinosaurs hadrosaurs are strikingly convergent with ducks and the duck-billed platypus. [76] Ichthyosaurs (such as Ophthalmosaurus) [77] are marine reptile of the Mesozoic era which looked strikingly like dolphins. [78] Several groups of marine reptiles evolved hyperphalangy similar to modern whales. [61]