Here is a cool picture of an Atrypa (Hall, 1862) brachiopod fossil (note the circle in the top left corner probably made by a gastropod). ...

  Earlier this month, I found this brachiopod fossil in the Genshaw Formation of Alpena, Michigan, USA. It appears to be a Cyrtina alpenens...

While collecting in Alpena Michigan USA earlier this month, I found something that I could not immediately identify. It was gastropod fossil...