Here is another Louisville area fossil on display in the Deep Time Exhibit. It is a Modiomorpha concentrica (Conrad, 1838) which is an extinct clam. It was found in Silver Creek Formation of Clark County Indiana USA. It dates to the Middle Devonian Period.
The picture was taken in June 2023 on the first floor of the Smithsonian Museum of Natural History in Washington D.C. USA.
Learn more about this at Smithsonian Department of Paleobiology Collections USNM PAL36267:
http://n2t.net/ark:/65665/3144474e8-1fcc-4ffe-8535-3b86911109aa
