对于古生代dna的研究开始于20世纪80年代中期。

Ancient-DNA research began in the mid-1980s.

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晚古生代早期的洋盆较狭窄，生存时间为数千万年。

The ocean basin became more narrow in early Late Paleozoic, which last several millions years.

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晚古生代早期的洋盆较狭窄，生存时间为数千万年。

The ocean basin became more narrow in early Late Paleozoic, which last several millions years.

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