The Galeaspid is one major group of Agnatha in the Middle Paleozoic, and is mainly distributed in China and North Vietnam.
盔甲鱼 类是古生代中期化石 无 颌 类的主要 类群，其分布主要限于我国境内以及越南北部。
The Galeaspid is one major group of Agnatha in the Middle Paleozoic, and is mainly distributed in China and North Vietnam.
盔甲鱼 类是古生代中期化石 无 颌 类的主要 类群，其分布主要限于我国境内以及越南北部。
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