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Size varies considerably in different regions, with average weight from 0.7 to 2.4 kg (1 lb 9 oz to 5 lb 5 oz); males have average length 50 cm (20 in), while females are the smaller at 43 cm (17 in). [21]
Male platypuses have sharp spurs on their back legs shaped like a canine tooth. These hollow spurs measure 0.59 to 0.71 inches long and connect to crural glands in the animal’s upper thighs.
Rheobatrachus, whose members are known as the gastric-brooding frogs or platypus frogs, is a genus of extinct ground-dwelling frogs native to Queensland in eastern Australia. The genus consisted of only two species, the southern and northern gastric-brooding frogs, both of which became extinct in the mid-1980s.
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 ...
A platypus bill has three different types of receptor cells that allow the mammal to detect movement, and also the electric fields produced by the small creatures it hunts.
A typical precocial mammal has a gestation period almost four times longer than a typical altricial mammal of the same body size. [34] Precocial mammal species generally have greater adult body weights than altricial mammals as precocial mammals have markedly longer gestation periods than altricial mammals. [35]
But beyond their sheer size and incredible speed, hippos also have sharp, 20-inch-long teeth. Their massive jaws can open up to 180 degrees, and they can bite down with a force three times greater ...
Thorlaksonius platypus ranges in size from 3.5–10 mm (0.14–0.39 in). [5] It has a variable color which closely resembles the variation of Alia carinata. The color of only a single specimen has been described. This individual displayed a brown and grey body with a singular yellow band across its dorsal plates, called the pereon.