PHYLUM VERTEBRATA c-U * 



SUB-PHYLUM ACRANIA* 



SUB-PHYLUM CRANIOTA 



• 



Super-CLASS CYCLOSTOMATA* &W^* ^ 



CLASS MYXINOIDES ' 

 CLASS PETROMYZONTES' 

 Super-CLASS HYPOSTOMATA 

 CLASS HETEROSTRACA 

 OSTEOSTRACA 

 ANTIARCHA xs 

 Super-CLASS GNATHOSTOMATA ' 

 CLASS ICHTHYES 

 I. Sub-CLASS PISCES 



Division ELASMOBRANCHII + 

 Order Proselachii ( 

 Plagiostomi 



SELACHII / 



RAIAE t 



Division AC AN TROD I " ' r*****piy{K 

 „ HOLOCEPHALI* 

 TELEOSTOMI ' 



Order Crossopterygii ^ 



