Possible predecessor of the cyclostomes

• Late Cambrian to late Triassic
• Small (2 in) extinct eellike fish with a finned tail and a notochord and having cone-shaped teeth containing cellular bone

Wikipedia Word definitions in Wikipedia
Conodonts ( Greek kōnos , " cone ", + odont , " tooth ") are extinct chordates resembling eels, classified in the class Conodonta . For many years, they were known only from tooth-like microfossils found in isolation and now called conodont elements . Knowledge ...

The Collaborative International Dictionary Word definitions in The Collaborative International Dictionary
Conodont \Co"no*dont\ (k[=o]"n[-o]*d[o^]nt), n. [Gr. kw^nos cone + 'odoy`s, 'odo`ntos, tooth.] (Zo["o]l.) A peculiar toothlike fossil of many forms, found especially in carboniferous rocks. Such fossils are supposed by some to be the teeth of ...

WordNet Word definitions in WordNet
n. tiny fossil cone-shaped tooth of the most primitive vertebrate: the conodont small (2 in) 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 ...

Wiktionary Word definitions in Wiktionary
n. 1 Any of several extinct fishlike chordates that had conelike teeth 2 A microfossil tooth of such an animal