Original: Craniata ( sometimes Craniota ) is a proposed clade of chordate animals that contains the Myxini ( hagfish ) , Cephalaspidomorphi ( including lampreys ) , and Gnathostomata ( jawed vertebrates ) Campbell & Reece 2005 p. 676Cracraft & Donoghue 2004 p. 390 as living representatives .
Simplified: Craniata ( sometimes Craniota ) is a proposed clade of chordate animals that contains the vertebrates ( subphylum Vertebrata ) and Myxini ( hagfish ) as living representatives .