Prehistoric mammal

Prehistoric mammal

Prehistoric mammals are groups of mammals that lived before humans developed writing. 164 million years ago, in the Jurassic period, "Castorocauda lutrasimilis", a mammal-like (mammaliaform) animal weighing about 500 grams (1.1 lb), had a full mammalian pelt, with guard hairs and under fur, webbed feet, and scales on the tail like a modern beaver, as well as teeth specialized for catching fish.

Later, about 130 million years ago in the Cretaceous, there existed larger mammals, including "Repenomamus giganticus" and "Repenomamus robustus". Fossils up to one meter (3¼ ft) long have been found, with dinosaur remains in their stomach contents.

The lineages of many varieties continued through the Tertiary period where some reached very large sizes. Most of the very large mammals became extinct in the last ice age, but have smaller descendants.

List of prehistoric mammals

Prehistoric mammals include:
* Amebelodon
* American Cheetah
* American Camel
* American Zebra
* Anancus
* Ancient Bison
* Ancient Narwhal
* Andrewsarchus
* Archaeobelodon
* Arsinoitherium
* Atzlan Rabbit
* Barytherium
* Basilosaurus
* Bone-crushing Dog
* "Brontotherium"
* "Castorocauda lutrasimilis" [http://www.newscientist.com/channel/life/mg18925414.500.html]
* Cave Bear
* Cave Lion
* Chalicothere
* Chalicotherium
* Deinotherium
* Diminutive Pronghorn
* Diprotodons
* Dire Wolf
* Doedicurus
* Dorudon
* Dwarf Killer Whale
* Dwarf Polar Bear
* Elasmotherium
* Embolotherium
* Entelodont
* Eobasileus

* European Jaguar

* European Hippopotamus
* Four-Tusked Elephant
* Giant Orangutan
* Giant Koala
* Giant Meerkat
* Giant Long-horned Buffalo
* Giant Lynx
* Giant Vampire Bat
* Giant Beaver
* Giant Killer Whale
* Giraffe Camel
* Glyptodon
* Gomphotherium
* Hypselephas
* "Hyracotherium"
* "Indricotherium/Baluchitherium/Paraceratherium"
* Irish Elk
* "Kennalestes"
* Knife-flippered Killer Whale
* Japanese Dwarf Elephant
* Harrison's Whale
* Horned Narhwal
* Hyaenodon
* Humpback Narhwal
* Japanese Cougar
* Juxia
* Macrauchenia
* Mammoths
** Columbian Mammoth
** Woolly Mammoth
** Pygmy Mammoth
** Imperial Mammoth
** Tundra Mammoth
** Wrangel Island Mammoth
* Malagasy River Dolphin
* Marsupial Lion
* Mastodons
** American Mastodon
** Palaeomastodon
** Sinomastodon
* Megaloceros
* "Megatherium"
* Meninatherium
* Menodus
* "Metamynodon"
* Moeritherium
* North American Camel
* North American Lion
* North American Llama
* Paratetralophodon
* Phiomia
* Platybelodon
* Primelephas
* Propalaeotherium
* Purgatorius
* Pygmy Polar Bear
* Pygmy Giant Panda
* Powerful Killer Whale
* "Repenomamus giganticus" and "r.robustus" [http://www.newscientist.com/channel/life/mg18825315.800.html;jsessionid=IPLHBBKJNEMG]
* Rhynchotherium
* Rinston's Bottlenose Dolphin
* Saber-toothed cats
** Smilodon
* Samotherium
* Sivatherium
* Shark-toothed Dolphin
* Short-faced Skunk
* Shuler's Pronghorn
* Stegodon
* Stubby-Tusked Narwhal
* Sensitive Ibex
* Swan-necked Seal
* Synthetoceras
* Teleoceras
* Tetrabelodon
* Tetralophodon
* Toxodon
* Trilophodon
* "Uintatherium"
* Walrus Whale
* Wilmington's Ground Sloth
* Wanda's Fox
* Woolly Rhinoceros

ee also

* Synapsid
* Therapsid
* Cynodont
* Mammaliaformes
* List of extinct mammals


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