The first 419-million-year-old galeaspid fossil completely preserved with gill filaments in the first branchial chamber (IMAGE)

Chinese Academy of Sciences Headquarters

The first 419-million-year-old galeaspid fossil completely preserved with gill filaments in the first branchial chamber

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The first 419-million-year-old galeaspid fossil completely preserved with gill filaments in the first branchial chamber

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IVPP

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