Keywords: Rhynchotremadentatum.jpg en Rhynchotrema dentatum a rhynchonellid brachiopod from the Cincinnatian Upper Ordovician of southeastern Indiana own Wilson44691 2008-12-17 Photograph taken by Mark A Wilson Department of Geology The College of Wooster http //www3 wooster edu/geology/MWilson html Cincinnatian Rhynchotrema Rhynchotrema fossils Fossils on black background |