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Apr 22, 2009 · Alex Tirabasso, Canadian Museum of Nature; (inset) Stefan Thompson. Scientists have found the first skeleton of a land-dwelling relative of seals, sea lions, and walruses. The 20-million- to 24-million-year-old Arctic fossil sports webbed feet instead of flippers, providing a long-sought glimpse of what such animals looked like before they dove ...
Apr 21, 2009 · Researchers have found a fossilized ancestor of modern seals and sea lions that they say represents an evolutionary step in the organisms' transition from land-dwelling mammals to the aquatic creatures they are today. The fossil skeleton is thought to be more than 20 million years old, making it the earliest fossil pinniped -- the taxonomic name for seals, sea lions and walruses -- yet ...
Apr 23, 2009 · Seals, sea lions and the walrus (collectively the pinnipeds) evolved from land-living carnivores, but the earliest known pinniped, Enaliarctos, already had flippers. This paper describes a fossil ...
- Natalia Rybczynski, Mary R. Dawson, Richard H. Tedford
- 2009
The earliest ancestors of seals and sea lions were mammals that transitioned from life on land to life at sea. Around 36 million years ago, at the end of the Oligocene, the ocean began to cool, which caused major changes to ocean circulation. This led to an increase in nutrients throughout the ocean and enabled ocean life to thrive.
May 24, 2024 · Most comprehensive seal family tree reveals the hidden history of walruses. By Josh Davis. First published 24 May 2024. 6. Seals are successful marine predators found in oceans around the world. But their current diversity is just a snapshot of the species that used to exist. A new study has now explored the evolutionary history of living and ...
Apr 22, 2009 · April 22, 2009, 8:10 PM UTC / Source: The Associated Press. By By Malcolm Ritter. Scientists say they've found a "missing link" in the early evolution of seals and walruses — the skeleton of a ...
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Apr 22, 2009 · Puijila is a massive boon for biologists trying to understand the evolution of pinnipeds, the group that includes seals, sea lions and walruses. It’s not itself a direct ancestor, having ...
