Fossils frequently found in St. Louis include the rugosan corals '' Lithostrotion `` and '' Lithostrotionella `` and the Bryozoan '' Fenestrellina `` .
Fossils commonly found in the St. Louis include the rugosan corals `` Lithostrotion '' and `` Lithostrotionella '' and the bryozoan `` Fenestrellina '' .