See text Ctenacanthus (from Greek: κτείς kteis, 'comb' and Greek: ἄκανθα akantha, 'spine')[1] 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.

[2][3][4]

This article about a prehistoric cartilaginous fish is a stub.

You can help Wikipedia by expanding it.