Holocephali
Holocephali san ian faan tau dialklasen faan a graselfasker (Chondrichthyes).

Det ööder dialklas san a Elasmobranchii.

Iindialang 
 Auerorder: Holocephalimorpha (Siakaater)
 Ordern: Chimaeriformes - †Chondrenchelyiformes - †Cochliodontiformes - †Copodontiformes - †Menaspiformes - †Psammodontiformes - †Squalorajiformes
 Auerorder: Paraselachimorpha
 Ordern: †Debeeriiformes - †Eugeneodontiformes - †Helodontiformes - †Iniopterygiformes - †Orodontiformes - †Petalodontiformes

A miast Holocephali san ütjstürwen. Daalang jaft at man noch ian order:

 Order: Chimaeriformes (Spööken, Draagfasker)
 Famile: Callorhinchidae
 Skööl: Callorhinchus 
 Famile: Chimaeridae 
 Sköölen: Chimaera - Hydrolagus
 Famile: Rhinochimaeridae
 Sköölen: Harriotta – Neoharriotta – Rhinochimaera

Luke uk diar 

 
Graselfasker