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Temporal range: Late Oligocene – Early Miocene
An artist's illustration of Enaliarctos emlongi
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Infraorder: Pinnipeda
Family: Enaliarctidae
Mitchell & Tedford, 1973
Genus: Enaliarctos
Mitchell & Tedford, 1973
Referred species
  • Enaliarctos barnesi
  • Enaliarctos emlongi
  • Phenacodus mealsi
  • Phenacodus mitchelli
  • Phenacodus tedfordi

Enaliarctos is a pinniped from late Oligocene to early Miocene California and Oregon, USA. This species would eventually evolve into seals and sea lions.

Enaliarctos's flippers were not as advanced as its modern relatives and its hind limbs were not modified into a tail like structure as seen in modern seals. It is thought to have had a similar lifestyle to that of a modern sea lion.