Tarrasius
| Tarrasiiformes Temporal range: Carboniferous |
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|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Subphylum: | Vertebrata |
| Infraphylum: | Gnathostomata |
| Superclass: | Osteichthyes |
| Class: | Actinopterygii |
| Subclass: | Chondrostei |
| Order: | Tarrasiiformes |
| Families | |
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Tarasiiformes is an extinct order of prehistoric ray-finned fish.
Tarrasius is an extinct genus of Tarasiiformes. Tarrasius problematicus (of Mississippian origin, ~ 350 Ma) featured a fully regionalized tetrapod-like spine divided into 5 distinct segments. It is not considered a transitional fossil though, but an extreme example of convergent evolution.
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