conodonts
牙形化石
英語(yǔ)翻譯 名詞 conodont:
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the tiny fossil cone-shaped tooth of a primitive vertebrate of order Conodonta
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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
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