Abstract

Of the four symmetry classes of conodont element-pairs recognized herein, two involve asymmetry. Asymmetry in the conodont-bearing organism need not preclude the concept of a nektonic mode of life, but it is clear that each conodont element was not part of a mirror-imaged pair. Interestingly, three of the four possible symmetry classes of conodont element-pairs are currently known to exist among scolecodont element-pairs of the polychaete jaw apparatus. Although not of suprageneric importance, the symmetry classification of conodont element-pairs is helpful in conodont taxonomy and can be useful in deciphering conodont lineages.

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