⟳ Репост от Tim Demko
I missed #MolluskMonday this week, so #FossilFriday is doing double duty with a small inoceramid. These bivalves could grow well over a meter across in the Cretaceous Interior Seaway, and it is generally suspected that they harbored some variety of sulfur metabolizing bacteria as chemosymbiotes. ⚒️🧪🦪