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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