El paleoceno
Páginas: 4 (921 palabras)
Publicado: 25 de agosto de 2010
The Paleogene
23 Million years 65 Million years
Paleocene, Eocene and Oligocene
The Cenozoic
(modern life)
The Age of Flowers & Mammals
orgrasses and rodents
or whales, sharks and penguins
Paleogene Life
• A lot of the record is found in the various badlands of Wyoming, the Dakotas, Montana, Colorado and Utah
Badlands NationalPark
Paleogene Life: Land
The evolutionary radiation of flowering plants The evolutionary radiation of Mammals as the dominant land animals. The emergence of grasses! Symbiotic relationshipsbetween Flowers and Insects, and between Grasses and many other animals including grazing animals, rodents and various carnivores Further development of early Primates The birds are big, but they’re notyellow and they’re not very friendly
Paleogene Life
• Mammals diversified
– Most modern orders present by Early Eocene
Fossil of Eomaia, the oldest known eutherian placental
PaleogeneLife
• Bats present by early Eocene
Paleogene Life
• Mammalian carnivores evolved by midPaleogene
Carnivora
Creodonts
Mesonychids, Mid-Paleocene Dog-like carnivoresAndrewsarchus, large carnivore (Early Eocene)
Ectocion Ralstonensis
Condylarthra is an order of extinct placental mammals known primarily from the Paleocene and Eocene epochs.
Skull of a Cave BearPaleogene Life
• Mammalian species doubled • Ungulates
– Odd-toed • Horses, tapirs, rhinos – Even-toed • Cloven-hoofed goats, sheep, pigs, cattle
Diacodexis, and even toed ungulate (EarlyEocene)
Ungulates (Hooved Animals)
Perissodactyls (Odd-Toed Ungulates)
Horses - Tapirs - Rhinos
Paleogene Life
• Earliest horses by end of Paleocene
– Size of small dogsHyracotherium (Eohippus)
Mesohippus)
Merychippus
Hipparion
Some highlights in horse evolution
More odd-toed ungulates
Wooly Rhino - Coelodonta
Paraceratherium
Paraceratherium...
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