Ctenacanthus
| Ctenacanthus Temporal range: | |
|---|---|
| Dorsal spine of the type species, C. major, as illustrated by Louis Agassiz | |
| Restoration of C. concinnus | |
| Scientific classification | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Order: | †Ctenacanthiformes |
| Family: | †Ctenacanthidae |
| Genus: | †Ctenacanthus Agassiz, 1837 |
| Type species | |
| Ctenacanthus major Agassiz, 1837 | |
| Species | |
|
See text | |
Ctenacanthus (from Greek: κτείς kteis, 'comb' and Greek: ἄκανθα akantha, 'spine') is an extinct genus of ctenacanthiform chondrichthyan. Remains have been found in the Bloyd Formation (Carboniferous Period) of Arkansas and the Cleveland Shale (Devonian Period) of Ohio in the United States and in South America.