Elasmobranchii

Great White Shark (Carcharodon carcharias )

The Plattenkiemer ( Elasmobranchii ) are a subclass of cartilaginous fish ( Chondrichthyes ) dar. Today only belong to them Neoselachii (modern sharks and rays) with over 930 extant species. There are also a number of extinct taxa, such as Cladoselache, Stethacanthus and the " freshwater sharks" ( Xenacanthiformes ).

The Elasmobranchii different from their sister group, the chimaeras ( Holocephali ) through five to seven gill slits without operculum and the racks where the teeth are permanently replaced.

System

• Plattenkiemer subclass ( Elasmobranchii ) Plesioselachus †
• Squatinactiformes †
• Protacrodontiformes †
• Cladoselachimorpha " Cladodus " †
• Cladoselachiformes †
• Symmoriida †

• Xenacanthiformes †

• Ctenacanthiformes †
• Hybodontiformes †
• Neoselachii Sharks ( Selachii )
• Rays ( Batoidea )