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Mar 20, 2024 · Today’s seals and sea lions are not direct descendants of Puijila, but the otter-like mammal represents what pinniped ancestors were like at one point in the distant past.
- Riley Black
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.
Enaliarctos, extinct genus of mammals that contains the oldest known member of Pinnipedia, the group that contains living seals, sea lions, and walruses. Enaliarctos is made up of five species, which lived from the late Oligocene Epoch (some 29 million years ago) into the Miocene Epoch (23 million.
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.
The oldest definitive pinniped fossils date from approximately 30.6–23 million years ago (Ma) in the North Pacific. Pinniped monophyly is consistently supported; the group shares a common ancestry with arctoid carnivorans, either ursids or musteloids. Crown pinnipeds comprise the Otariidae (fur seals and sea lions), Odobenidae (walruses), and ...
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.
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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.
