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Hippopotamidae is a family of stout, naked-skinned, and semiaquatic artiodactyl mammals, possessing three-chambered stomachs and walking on four toes on each foot. While they resemble pigs physiologically, their closest living relatives are the cetaceans.
Hippopotamus skull, showing the large canines and incisors used for fighting. The hippopotamus is a megaherbivore and is exceeded in size among land animals only by elephants and some rhinoceros species. The mean adult weight is around 1,480 kg (3,260 lb) for bulls and 1,365 kg (3,009 lb) for cows.
The name Whippomorpha is a combination of English (wh[ale] + hippo[potamus]) and Greek (μορφή, morphē = form). [2]Some attempts have been made to rename the suborder Cetancodonta, due to the misleading utilization of the suffix -morpha for a crown group, [6] as well as the risk of confusion with the clade Hippomorpha (which consists of equid perissodactyls); [7] however Whippomorpha ...
The Cypriot pygmy hippopotamus is the smallest known hippopotamus species, along with the roughly same-sized living African pygmy hippopotamus (Choeropsis liberiensis). The Cypriot pygmy hippopotamus is estimated to have had a body mass of around 130 kilograms (290 lb), [ 7 ] a height of 70 cm (2.3 ft) and a length of 125 cm (4.1 ft), [ 2 ] an ...
Birds' hearts and brains, which are very sensitive to arterial hypoxia, are more vascularized compared to those of mammals. [72] The bar-headed goose ( Anser indicus ) is an iconic high-flyer that surmounts the Himalayas during migration, [ 73 ] and serves as a model system for derived physiological adaptations for high-altitude flight.
The pygmy hippopotamus or lala pygmy hippo (Choeropsis liberiensis) is a small hippopotamid which is native to the forests and swamps of West Africa, primarily in Liberia, with small populations in Sierra Leone, Guinea, and Ivory Coast. It has been extirpated from Nigeria. [1] The pygmy hippo is reclusive and nocturnal.
Great northern hippopotamus or Nile hippopotamus H. a. amphibius – (the nominate subspecies) which stretched from Egypt, where they are now extinct, south up the Nile River to Tanzania and Mozambique; East African hippopotamus H. a. kiboko – in Kenya in the African Great Lakes region, and in Somalia in the Horn of Africa. Broader nasals and ...
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