cyclostome (sĪˈkləstōmˌ) [key], jawless fish, member of the Cyclostomata, the only living order of the vertebrate class Agnatha (see Chordata). This group includes the hagfish and the lamprey. The name also applies to members of the order Cyclostomata of the invertebrate phylum Ectoprocta, class Gymnolaemata.

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2012, Columbia University Press. All rights reserved.

More on cyclostome from Fact Monster:

  • hagfish - hagfish hagfish, primitive marine fish of the order Cyclostomata, or jawless fishes (see ...
  • lamprey - lamprey lamprey, name for several primitive marine and freshwater fishes of the order Cyclostomata, ...
  • Chordata: Subphylum Vertebrata - Subphylum Vertebrata Vertebrates constitute the vast majority of living chordates, and they have ...
  • Encyclopedia: Vertebrate Zoology - Encyclopeadia articles concerning Vertebrate Zoology.

See more Encyclopedia articles on: Vertebrate Zoology

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