These are photos of the organisms, rays and sharks, we will be further investigating in the class Chondrichthyes.
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The organisms in this category have been known to exist on earth about four hundred and sixteen million years ago. Through evolution in the past centuries, this class has diversified and now, this class is divided into two sub-classes, Holocephali and Elasmobranchii. The sub-class Holocephali, consists of one order, Chimaeriformes. Whereas, the other sub-class, Elasmobranchii consists of the majority of the orders in this class. Elasmobranchii includes orders that are under the groups, Rays, Galean Sharks, and Squalomorph Sharks.
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