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Platypuses have been used several times as mascots: Syd the platypus was one of the three mascots chosen for the Sydney 2000 summer Olympics along with an echidna and a kookaburra, [134] Expo Oz the platypus was the mascot for World Expo 88, which was held in Brisbane in 1988, [135] and Hexley the platypus is the mascot for the Darwin operating ...
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 monotreme platypus has what looks like a bird's beak (hence its scientific name Ornithorhynchus), but is a mammal. [38] However, it is not structurally similar to a bird beak (or any "true" beak, for that matter), being fleshy instead of keratinous. Red blood cells in mammals lack a cell nucleus.
In anteaters and pangolins, the fingers have large claws for opening the mounds of social insects. Platypus fingers have webbing that extend past the fingers to aid in swimming, thus knuckle-walking is used to prevent stumbling. [16] Knuckle-walking of chimpanzees and gorillas, arguably, originally started from fist-walking as found in ...
Platypus foot. Some semiaquatic mammals have webbed feet. Most of these have interdigital webbing, as opposed to the syndactyly found in birds. Some notable examples include the platypus, the beaver, the otter, and the water opossum. [19] [20] [21] Capybaras have slightly webbed feet, [22] while hippopotamuses have webbed toes. [23]
This contrasts with the modern platypus, where adults are entirely toothless. It has been theorized that the loss of teeth in the platypus was a geologically recent event, occurring only in the Pleistocene (after over 95 million years of tooth presence in the ornithorhynchid lineage) after the migration of the rakali ( Hydromys chrysogaster ...
Their adaptation can be seen in many unique physiognomic characteristics such as the dorsal blowhole, baleen teeth, and the cranial 'melon' organ used for aquatic echolocation. The closest extant terrestrial relative to the whale is the hippopotamus , which spends much of its time in the water and whose name literally means "horse of the river".
This is an accepted version of this page This is the latest accepted revision, reviewed on 11 February 2025. Taxonomic group of semi-aquatic mammals Pinnipeds Temporal range: Latest Oligocene – Holocene, 24–0 Ma Pre๊ ๊ O S D C P T J K Pg N Clockwise from top left: Grey seal (Halichoerus grypus), Steller sea lion (Eumetopias jubatus), New Zealand fur seal (Arctocephalus forsteri ...