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Temporal range: Early Carboniferous
Sphenacanthus is an extinct genus of shark which lived in the Early Carboniferous of Scotland. It lived about 359 million years ago, and was one of the earliest of sharks. Sphenacanthus likely hunted fish. It inhabited fresh water.
Sphenacanthus had seven fins, two on the top and five on the bottom. Its maximum size is unknown.
Sphenacanthus inhabited what is now Scotland. It shared its freshwater habitat with other sharks, including the one-meter Xenacanthus. It is possible that Sphenacanthus may have preyed on its smaller relative.
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