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词汇 Pteraspidiformes
分类 英语词汇 英语翻译词典
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Pteraspidiformes

英语百科

Pteraspidiformes

Rhinopteraspis fossil
Restoration of Larnovaspis

Pteraspidiformes is an extinct order of heterostracan agnathan vertebrates known from extensive fossil remains primarily from Early Devonian strata of Europe and North America, and from Upper Silurian Canada.

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