APP Definition:A member of an extinct group of small primitive fishlike chordates,preservedprimarily in the form of their conelike teeth. 牙形动物yá xíng dòng wù带有牙形刺骨骼的动物。Extended Term:conodont assemblage 牙形石集合......（本文共 179 字） [阅读本文] >>
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Definition:A member of an extinct group of small primitive fishlike chordates,preservedprimarily in the form of their conelike teeth. 牙形动物yá xíng dòng wù带有牙形刺骨骼的动物。Extended Term:conodont assemblage 牙形石集合......（本文共 179 字） [阅读本文] >>
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