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Information about the taxonomy of sharks
Kingdom: Animalia
Phylum: Chordata
Class: Chondrichthyes
Subclass: Elasmobranchii
Elasmobranchii also include rays and skates
Chondrychthyes also include Chimaeras.
Since time, sharks have evolved into over 400 species.
Today, there are 9 Orders of sharks, 33 Families with approximately 470 species.
Source: http://en.wikipedia.org/w/index.php?title=File:Extant_Shark_Orders.svg&page=1
Figure: Tree of life of the Shark Family
Copyright December 2014; Olivia Lucie Meier, Sharkworld.
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