| Mesacanthus Temporal range: Early Devonian |
|
|---|---|
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Acanthodii |
| Genus: | Mesacanthus |
Mesacanthus ('middle spine') is an extinct genus of acanthodian fish from early Devonian Scotland. It is among the more primitive of the early Devonian acanthodians.