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.
这只2300万年
生物并不是如今海豹、海狮和海
系祖先，而是来自另一个分
。
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.
这只2300万年生物并不是如今海豹、海狮和海系祖先，而是来自另一个分。
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