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Ctenacanthiforme

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Ctenacanth

Ctenacanthus (from Benton, 2005)

The Ctenacanthiformes existed from the Devonian to the Triassic, and were similar in appearance to modern sharks. The endoskeleton of the pelvic fins was, again, comparable to that of modern sharks. Furthermore, their two dorsal fins were supported by anterior fin spines, as well as by basal cartilages with radials extending from them. The cadaul fin was heterocercal (externally asymmetrical), as it is in the Neoselachii.

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