Semionotiformes
| Semionotiformes Temporal range: Late Permian-Late Cretaceous |
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| Scheenstia maximus from the Solnhofen Limestone, in South Germany | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Actinopterygii |
| Subclass: | Neopterygii |
| Order: |
†Semionotiformes Arambourg and Bertini, 1958 |
| Families | |
Semionotiformes ("flag-back form") is an order of primitive, ray-finned, primarily freshwater fish from the Triassic to the Cretaceous. The best-known genus is Semionotus of Europe and North America.
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