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Dugongidae's body weight ranges from 217 to 307 kg for juveniles, 334 to 424 kg for subadults, and 435 to 568.5 kg for adults. Oral temperatures for individual dugongs is determined from 24° to 34.2 °C. Heart rate readings are from 40 to 96 bpm and vary between individual dugongs. Respiration rate during the out-of-water phase is from 1 to 33.
The dugong (/ ˈ d (j) uː ɡ ɒ ŋ /; Dugong dugon) is a marine mammal.It is one of four living species of the order Sirenia, which also includes three species of manatees.It is the only living representative of the once-diverse family Dugongidae; its closest modern relative, Steller's sea cow (Hydrodamalis gigas), was hunted to extinction in the 18th century.
With the appearance of the Dugongidae at this time, sirenians had evolved the characteristics of the modern order, including an aquatic, streamlined body with flipper-like fore limbs and no hind limbs, and a powerful tail with horizontal caudal fins which uses an up-and-down motion to move them through the water. [30]
Articles relating to the Dugongidae, a family in the order of Sirenia. The family has one surviving species , the dugong ( Dugong dugon ), one recently extinct species, Steller's sea cow ( Hydrodamalis gigas ), and a number of extinct genera known from fossil records.
It is the stratigraphically oldest species of Metaxytherium and relatively small, with a body size of 2 to 3 meters. [1] M. arctodites; M. arctodites is found in mid Miocene (15 - 14 Ma) layers of California and Baja California, specifically the Topanga Formation and Rosarito Beach Formation.
By the time the Eocene drew to a close, came the appearance of the Dugongidae; sirenians had acquired their familiar fully aquatic streamlined body with flipper-like front legs with no hind limbs, powerful tail with horizontal caudal fin, with up and down movements which move them through the water, like cetaceans.
It is an early member of the family Dugongidae, which includes the extant dugong. Fossils have been found from Egypt , India , and Madagascar . Eotheroides was first described by Richard Owen in 1875 under the name Eotherium , which was replaced by the current name in 1899.
All members of the order are endemic to the twin land masses of Australia-New Guinea and most have the characteristic bandicoot shape: a plump, arch-backed body with a long, delicately tapering snout, very large upright ears, relatively long, thin legs, and a thin tail. Family: Peramelidae. Subfamily: Peramelinae. Genus: Isoodon