Abstract

About 56,000 conodont elements are referred to 25 species and 16 genera. One new species, Rhipidognathus rowlandensis, is described. The conodonts came from 16 sections in rocks of Late Maysville and Richmond age in the Cincinnati area. Three faunas are recognized. A northern fauna dominated by Phragmodus undatus and Plectodina furcata and a southern fauna distinguished by species of Plectodina, Zygognathus, and Rhipidognathus were present throughout the late Maysville and Richmond time. In late Richmond time a third fauna characterized by Belodina and Panderodus invaded from the northwest.

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