原正形贝目(学名:Protorthida)是小嘴贝纲下的一个已灭绝目。
下属分类
- 原正形贝超科 Protorthoidea
- 原正形贝科 Protorthidae
- 科 Leioriidae
- 超科 Skenidioidea
- 科 Skenidiidae
参考文献
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