Pteraspidiformes



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.
单词 | Pteraspidiformes |
释义 |
Pteraspidiformes
英语百科
Pteraspidiformes![]() ![]() ![]() 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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