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

   anatomypubs.onlinelibrary.wiley.com › doi › full

   May 21, 2007 · Marine Mammal Diversity. Living groups of marine mammals vary greatly in their diversity. Rice (1998; Table 1 therein) reports that living Cetacea include 83 species in 39 genera; living Pinnipedia include 36 species in 21 genera; and Recent Sirenia include 5 species in 3 genera. Since then, several new species of cetaceans have been described ...

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

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   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 ...

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

   • Publish Year: 2009

3. People also ask

   How many species of marine mammals are there?

   • Living groups of marine mammals vary greatly in their diversity. Rice ( 1998; Table 1 therein) reports that living Cetacea include 83 species in 39 genera; living Pinnipedia include 36 species in 21 genera; and Recent Sirenia include 5 species in 3 genera.

   Evolution of marine mammals: Back to the sea after 300 million years

   anatomypubs.onlinelibrary.wiley.com/doi/full/10.1002/ar.20545

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   How long did it take for marine mammals to evolve?

   • We are working with Nick to develop a full website on the evolution of marine mammals — we'll keep you posted! It has taken 50 million years for cetaceans and pinnipeds to evolve into the largest, most efficient predators in the oceans.

   The return to the sea: The evolution of marine mammals

   ucmp.berkeley.edu/about/shortcourses/shortcourse11.php

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   When did mammalian evolution start?

   • This is no great surprise, because a great deal of mammalian evolution has been linked to changes in feeding ecology. It is also interesting to note that the clades of marine mammals seem to have originated at two discrete times, Cetacea and Sirenia during the early Eocene, and Desmostylia and Pinnipedia during the Oligocene.

   Evolution of marine mammals: Back to the sea after 300 million years

   anatomypubs.onlinelibrary.wiley.com/doi/full/10.1002/ar.20545

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   Do marine mammals have evolutionary histories?

   • Before comparing the evolutionary histories of each of the clades of marine mammals, it is worth emphasizing that the evolutionary histories outlined here are only the most basic and superficial sketches of the morphological changes that these groups have undergone.

   Evolution of marine mammals: Back to the sea after 300 million years

   anatomypubs.onlinelibrary.wiley.com/doi/full/10.1002/ar.20545

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4. www.pbs.org › wnet › natureOcean Giants | Going Aquatic: Cetacean Evolution - PBS

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   Mar 21, 2012 · This is an exciting time to study marine mammal evolution as many of the most important discoveries in this field have been made in the last 10-15 years, and there is no reason to expect that pace ...

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

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   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 ...

   • Author: Mark D. Uhen
   • Email: muhen@gmu.edu

   • Publish Year: 2013

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7. www.smithsonianmag.com › science-nature › how-didHow Did Whales Evolve? | Science| Smithsonian Magazine

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   Dec 1, 2010 · By the time the first mammals evolved 200 million years ago, however, dinosaurs were the dominant vertebrates. ... Basilosaurus did share some traits with marine reptiles, ... two jaw fragments ...

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

   ucmp.berkeley.edu › about › shortcourses

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   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 ...