The Cenozoic. Tectonics. Tectonics of the Mesozoic and Cenozoic. Major Mammal Groups. Multituberculates - now extinct - rodent-like mammals who lived from Jurassic to Oligocene and were probably outcompeted by modern rodents – longest lived of all groups!
Tectonics of the Mesozoic and Cenozoic
What is the problem they are trying to solve?
What’s better, marsupial reproduction or placental?
Info and images from M. Jehle, Paleocene Mammals of the World,
Paleocene multituberculate Ptilodus, about 50 cm in length
Ectoconus – Paleocene herbivore; size of goat or sheep
Purgatorius, possible ancestor to later primates
Ectoganus and two Pantolambda – digging for food
Plesiadapis, anoter possible ancestor to later primates
Carpolestes, from late Paleocene
Chriacus – larger, more mobile
Phenacodus – sheep-sized herbivore – note the feet
Oxyaena - predator
Pachyaene attack Diatryma (~8 feet tall)
Uintathere and early horse ancestors in the Eocene
Sarkastodon (member of creodonts; dominant predators from 55-35 Ma)
6’ at shoulder; could kill a modern elephant
Brontothere – rhino sized herbivore
Irish Elk – largest deer variety ever; from Pleistocene; not restricted to Ireland, but good fossils found there
Mastodon – Pliocene to end of Pleistocene – ate leaves
Mammoth – Pliocene to 1500 BCE (dwarf species survived on Wrangel Island, Russia) – ate grasses