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Much of the world was introduced to the platypus in 1939 when National Geographic Magazine published an article on the platypus and the efforts to study and raise it in captivity. The latter is a difficult task, and only a few young have been successfully raised since, notably at Healesville Sanctuary in Victoria .
Ornithorhynchoidea is a superfamily of mammals containing the only living monotremes, the platypus and the echidnas, as well as their closest fossil relatives, to the exclusion of more primitive fossil monotremes of uncertain affinity.
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 ...
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 ...
The platy (Xiphophorus maculatus) grows to a maximum overall length of 7.0 cm (2.8 in).Sexual dimorphism is slight, the male's caudal fin being more pointed. The anal fin of the male fish has evolved into a gonopodium, a stick-shaped organ used for reproduction.
The second species named, Obdurodon dicksoni, occasionally called the Riversleigh Platypus, [6] was described by Archer et al who detailed a skull and several teeth found in lower-middle Miocene deposits from the Riversleigh Ringtail Site. The type specimen, an exceptionally well preserved skull, is one of the most intact fossil skulls to be ...
Members of the Caniformia group are found worldwide. Carnivorans live on every major landmass and in a variety of habitats, including polar regions, hyper-arid deserts, and the open seas. They come in a wide array of body plans in contrasting shapes and sizes, ranging from the 17 cm (7 in) least weasel to the 6 m (20 ft) and 3,700 kg (8,200 lb ...
Because it possesses a strange combination of anatomical features, it is said to be the "platypus of crabs". [3] The presence of certain features in this species, such as its large claws and swimming limbs, confirm that those features were present in the crab lineage up to 95 million years ago. [4] It evolved during the Cretaceous crab revolution.