Ischyodus

Encyclopedia : I : IS : ISC : Ischyodus

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Ischyodus is an extinct genus of cartaliginous fish belonging to the subclass Holocephali, which includes the modern-day chimaeras.

Ischyodus was virtually identical to the present-day chimaera Chimaera monstrosa, which is found in the Atlantic Ocean and Mediterranean Sea. Just like C. monstrosa, Ischyodus had large eyes, a long whip-like tail, small lips, large pectoral fins and dorsal fin, and a poisonous dorsal spike attached to the front of the dorsal fin. The spike probably served as a method of protection against predators.

 

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