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 from the Canadian Arctic that represents an earlier stage in pinniped evolution, documenting the otter-like transition between land and water.
- Natalia Rybczynski
- Mary R. Dawson
- Richard H. Tedford
