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North Pacific
- The oldest definitive pinniped fossils date from approximately 30.6–23 million years ago (Ma) in the North Pacific.
www.annualreviews.org/content/journals/10.1146/annurev-earth-082517-010009The Origin and Evolutionary Biology of Pinnipeds: Seals, Sea ...
Apr 22, 2009 · 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 into the sea.
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 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.
Apr 22, 2009 · The 23 million-year-old creature was not a direct ancestor of today's seals, sea lions and walruses, a group known collectively as pinnipeds. It's from a different branch.
May 24, 2024 · There are two fossil candidates for what could be considered the first seal ancestors, called Potamotherium and Puijila. Both were likely living similar lifestyles as otter-like animals, but the issue is that they come from completely different parts of the world.
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 ...
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Apr 22, 2009 · Seals evolved from carnivorous ancestors that walked on land with sturdy legs; only later did these evolve into the flippers that the family is known for. Now, a beautifully new fossil called Puijila illustrates just what such early steps in seal evolution looked like.
