Mesacanthus
| Mesacanthus Temporal range: Devonian
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|---|---|
| Life reconstruction of M. pusillus | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | †Acanthodii |
| Order: | †Acanthodiformes |
| Family: | †Mesacanthidae |
| Genus: | †Mesacanthus Traquair, 1888 |
| Species | |
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Mesacanthus ('middle spine') is an extinct genus of acanthodian fish from Devonian Scotland. It is among the more primitive of the Devonian acanthodians.