Craniata (sometimes Craniota) is a proposed clade of chordate animals that contains the Myxini (hagfish), Petromyzontida (including lampreys), and Gnathostomata (jawed vertebrates) as living representatives. As the name suggests, Craniata is animals with a (hard bone or cartilage) skull in Chordata. Craniata as an unranked taxon replaces the former use of Vertebrata (Vertebrata sensu lato). The main difference of the old and new (Vertebrata sensu stricto) interpretation of Vertebrata is that Myxini and sometimes the Petromyzontida (see Systematics and taxonomy, below) are no longer included in Vertebrata. The Myxini lack proper vertebrae, which are characteristic for vertebrates according to the new interpretation, whereas traditionally, and confusingly, they were not (Hickman et al., 2007).

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