Enaliarctos is an extinct genus of pinniped.

Prior to the discovery of Puijila, the five species in the genus Enaliarctos represented the oldest known pinniped fossils, having been recovered from late Oligocene and early Miocene (ca. 24-22 million years ago) strata of California and Oregon. It had a short tail and developed limbs with webbed feet. Unlike modern sea lions, it had a set of slicing carnassials; the presence of slicing (rather than purely piercing teeth in modern fish-eating pinnipeds) suggests that Enaliarctos needed to return to shore with prey items in order to masticate and ingest them. Still, Enaliarctos had some sea lion-like characteristics such as large eyes, sensitive whiskers, and a specialized inner ear for hearing underwater.

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