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  1. evolution-outreach.biomedcentral.com › articles › 10From Land to Water: the Origin of Whales, Dolphins, and ...

    Apr 16, 2009 · Cetaceans (whales, dolphins, and porpoises) are an order of mammals that originated about 50 million years ago in the Eocene epoch. Even though all modern cetaceans are obligate aquatic mammals, early cetaceans were amphibious, and their ancestors were terrestrial artiodactyls, similar to small deer. The transition from land to water is documented by a series of intermediate fossils, many of ...

    • J. G. M. Thewissen, Lisa Noelle Cooper, Lisa Noelle Cooper, John C. George, Sunil Bajpai
    • 2009

  2. anatomypubs.onlinelibrary.wiley.com › doi › fullEvolution of marine mammals: Back to the sea after 300 ...

    May 21, 2007 · Evolution of marine mammals: Back to the sea after 300 million years. Mark D. Uhen. First published: 21 May 2007. https://doi.org/10.1002/ar.20545. Citations: 144. Sections. PDF. Tools. Share. Abstract. The fossil record demonstrates that mammals re-entered the marine realm on at least seven separate occasions.

    • Mark D. Uhen
    • 144
    • 2007
    • 21 May 2007

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  4. uvm.edu › ~dstratto › bcor1021 Phylogenetic History: The Evolution of Marine Mammals - WRUV

    A rigorous test for the evolution of marine mammals would use many more species and more characters. But the general result holds: mammals made the transition to water at least three times: in pinnipeds (seals and walruses), in whales, and also in sirenians (dugongs and manatees).

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  5. ucmp.berkeley.edu › about › shortcoursesThe return to the sea: The evolution of marine mammals

    The return to the sea: The evolution of marine mammals. : : : Both morphological and molecular data tell us that the ancestors of the marine mammals were terrestrial, and that their various marine lifestyles have evolved independently at least seven times! Each lineage shows shared as well as unique evolutionary solutions to the challenges of ...

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  7. en.wikipedia.org › wiki › Evolution_of_mammalsEvolution of mammals - Wikipedia

    The evolution of mammals has passed through many stages since the first appearance of their synapsid ancestors in the Pennsylvanian sub-period of the late Carboniferous period. By the mid- Triassic, there were many synapsid species that looked like mammals. The lineage leading to today's mammals split up in the Jurassic; synapsids from this ...

  8. link.springer.com › article › 10A Brief History of Marine Mammals | Journal of Mammalian ...

    Oct 18, 2012 · University of California Press, Berkeley, CA. 2012. 205 pp., $49.95 (cloth), $25.62 (Kindle). ISBN 9780520270572. Annalisa Berta leads readers through a vast range of topics regarding the evolution of marine mammals in Return to the Sea: The Life and Evolutionary Times of Marine Mammals. In this volume geared towards non-specialists (one might ...

  9. www.nationalgeographic.com › article › rise-mammalsRise of Mammals Article, Mammal Evolution Information, Facts ...

    As that bipedal ape evolved into what would become us, other mammals came and went. Most had to adapt to yet another global climate change about 2.5 million years ago, triggered in part by the ...