conodont

Noun
  1. The tiny fossil cone-shaped tooth of a primitive vertebrate of order Conodonta (synset 101479337)
    is a type of: tooth - hard bonelike structures in the jaws of vertebrates; used for biting and chewing or for attack and defense
  2. Small (2 inches long) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone;
    Late Cambrian to late Triassic;
    Possible predecessor of the cyclostomes (synset 101479059)
    is a type of: agnathan, jawless fish, jawless vertebrate - eel-shaped vertebrate without jaws or paired appendages including the cyclostomes and some extinct forms
    belongs to: conodonta, conodontophorida, order conodonta, order conodontophorida - extinct order of primitive vertebrates; the precise taxonomy is not clear; in some classifications considered a separate phylum

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