(no DSM#) Extinct species - This oyster that is extremely common in the Late Cretaceous strata of North Mississippi. Sometimes you can find these creatures encrusting other organisms.
(no DSM#) This common name for this type of oyster is called the Foam Oyster, or Honeycomb Oyster. Their temporal range extends all they way to the early Pleistocene, which means they survived the K-Pg extinction.