- Analysis of the previously unknown, long-extinct animal also confirms that cetaceans -- the group to which whales, dolphins and porpoises belong -- are in fact the hippo's closest living cousins.www.abc.net.au/science/articles/2015/02/25/4186654.htm
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Alles weergeven op WikipediaDespite their highly modified bodies and carnivorous lifestyle, genetic and fossil evidence places cetaceans as nested within even-toed ungulates, most closely related to hippopotamus within the clade Whippomorpha. Meer weergeven
Cetacea is an infraorder of aquatic mammals belonging to the order Artiodactyla that includes whales, dolphins, and porpoises. Key characteristics are their fully aquatic lifestyle, streamlined body shape, often large size … Meer weergeven
Circulation
Cetaceans have powerful hearts. Blood oxygen is distributed effectively throughout the body. They are warm-blooded, i.e., they hold a … Meer weergevenSleep
Conscious breathing cetaceans sleep but cannot afford to be unconscious for long, because … Meer weergevenThe two parvorders, baleen whales (Mysticeti) and toothed whales (Odontoceti), are thought to have diverged around thirty … Meer weergeven
Cetacean bodies are generally similar to those of fish, which can be attributed to their lifestyle and the habitat conditions. Their body … Meer weergeven
Range and habitat
Cetaceans are found in many aquatic habitats. While many marine species, such as the blue whale, the humpback whale and the Meer weergevenReproduction and brooding
Most cetaceans sexually mature at seven to 10 years. An exception to this is the La Plata dolphin, which is sexually mature at two years, but lives only to about 20. The sperm whale reaches sexual maturity within about … Meer weergevenWikipedia-tekst onder CC-BY-SA-licensie The modern hippopotamus and the pygmy hippopotamus are the only living members of the family Hippopotamidae. Some taxonomists place hippos and anthracotheres in the superfamily Anthracotheroidea. Hippopotamidae are classified along with other even-toed ungulates in the order Artiodactyla.
Five subspecies of hippos have been described based on morphological differe…Wikipedia · Tekst onder CC-BY-SA-licentieWEBCetaceans are thought to have evolved during the Eocene (56-34 mya), the second epoch of the present-extending Cenozoic Era. Molecular and morphological analyses suggest Cetacea share a relatively recent closest common ancestor with hippopotami and that they are sister groups.
How Whales and Hippos Evolved Water-Ready Skin
WEB1 apr. 2021 · Current scientific thinking is that these “aquatic” skin traits were already present in the amphibious common ancestor of hippos and cetaceans, the group that includes whales, dolphins, and porpoises. But …
Skin deep: Aquatic skin adaptations of whales and hippos evolved ...
WEB1 apr. 2021 · Hippos and cetaceans are close relatives, but their shared. Date: April 1, 2021. Source: American Museum of Natural History. Summary: A new study shows that the similarly smooth, nearly...
WEB24 feb. 2015 · According to molecular data, hippopotamuses and cetaceans form a clade excluding other extant cetartiodactyls. Despite a wealth of spectacular specimens documenting cetacean evolution, this...
Progressive evolution of secondary aquatic adaptation in hippos …
WEB20 dec. 2022 · The fully-aquatic cetaceans and semi-aquatic hippos, collectively forming the clade Whippomorpha, provide an excellent comparative model for investigating the secondary aquatic adaptation 1....
How did hippo, whale and dolphin skin adapt to live in …
WEB1 apr. 2021 · Paleontologists have long asked if hippopotamuses and cetaceans – whales, dolphins and porpoises – share a common, amphibious ancestor. The answer, which is no, according to a study …
Progressive evolution of secondary aquatic adaptation in hippos …
WEBThe fully-aquatic cetaceans and semi-aquatic hippos, collectively forming the clade Whippomorpha, provide an excellent comparative model for investigating the secondary aquatic adaptation1. One...
Skin deep: Aquatic skin adaptations of whales and hippos evolved ...
WEBApril 1 2021. Paintings of dolphin (top), early extinct cetacean (middle), and hippo (bottom) Credit: Carl Buell. A new study shows that the similarly smooth, nearly hairless skin of whales and...
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