Agnatha

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Translingual[edit]

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Agnatha, such as this lamprey, are distinguished by the lack of a jaw.

Etymology[edit]

From Ancient Greek ἀ- (a-, without) + γνάθος (gnáthos, jaw).

Proper noun[edit]

Agnatha

  1. A taxonomic superclass within the subphylum Vertebrata — the jawless fishes, or agnathans.
    • 1889, Edward Drinker Cope, "Synopsis of the Families of Vertebrata", The American Naturalist, volume 23, page 852:
      The known members of the class Agnatha are a very small representation of those that once existed; and they present a great variety of character, having little affinity with each other.
    • 2007, Chad Thomas et al., Freshwater Fishes of Texas, Texas A&M University Press, page 6:
      Current classification schemes have living fishes assigned to two superclasses (Agnatha, or jawless chordates, and Gnathostomata, or jawed chordates)[…].

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