Keywords: Pycnodonte pulaskiensis Clayton.jpg en Pycnodonte pulaskiensis from the Clayton Formation Paleocene of Mississippi own Wilson44691 2011-01-17 Photograph taken by Mark A Wilson Department of Geology The College of Wooster http //markwilson voices wooster edu/ Ostreoida fossils Paleocene fossils from the United States Fossils of Mississippi Pycnodonte |