The hagfish is classified in the phylum Chordata, subphylum Vertebrata, class Myxini, order Myxiniformes, family Myxinidae. The Columbia Electronic Encyclopedia™ Copyright © 2022, Columbia University Press. Licensed from Columbia University Press. All rights reserved....
The hagfish belongs to the subphylumVertebratabecause, although they have no spinal column, they have rudimentary vertebrae. Then the hagfish is in the superclassCyclostomataand the class Myxini; however, they were once in the historical class called Agnatha, for jawless fish (agnathans), with...
The hagfish is unique among the non-extinct members of the phylum Chordata since it has a partial cranium but no vertebrae. It differs from all other vertebrates by having no cardiac innervation, no radial muscles, no eye lens and no extrinsic eye muscles. The eyes are poorly developed and ...
Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online.Hagfish are marine craniates of the class Agnatha or Myxini, also known as Hyperotreti. Some researchers regard Myxini as not belonging to the subphylum Vertebrata. Tha...