<P> Chondrichthyes ( / kɒnˈdrɪkθɪ. iː z / ; from Greek χονδρ - chondr - ' cartilage ' , ἰχθύς ichthys ' fish ' ) is a class that contains the cartilaginous fishes : they are jawed vertebrates with paired fins , paired nares , scales , a heart with its chambers in series , and skeletons made of cartilage rather than bone . The class is divided into two subclasses : Elasmobranchii ( sharks , rays , skates , and sawfish ) and Holocephali ( chimaeras , sometimes called ghost sharks , which are sometimes separated into their own class ) . </P>
<P> Chondrichthyes ( / kɒnˈdrɪkθɪ. iː z / ; from Greek χονδρ - chondr - ' cartilage ' , ἰχθύς ichthys ' fish ' ) is a class that contains the cartilaginous fishes : they are jawed vertebrates with paired fins , paired nares , scales , a heart with its chambers in series , and skeletons made of cartilage rather than bone . The class is divided into two subclasses : Elasmobranchii ( sharks , rays , skates , and sawfish ) and Holocephali ( chimaeras , sometimes called ghost sharks , which are sometimes separated into their own class ) . </P>
sharks rays and skates belong to what group
sharks rays and skates belong to what group
Elasmobranchii
Elasmobranchii