原棘鳍总目鱼类的棘鳍不发达，有的只有弱棘。

• 鲑形目Salmoniformes
• 鼠鱚目Gonorhynchiformes

• 硬骨鱼
• 鱼类分类表

Protacanthopterygii is a ray-finned fish taxon ranked as a superorder of the infraclass Teleostei. They inhabit both marine and freshwater habitats. They appear to have evolved in the Cretaceous or perhaps late Jurassic, originating probably roughly 150 million years ago; fossils of them and the closely related Otocephala are known from throughout the Cretaceous.