5.4" Mercenaria Permagna Clam Fossil Golden Calcite Crystal Rucks Pit Florida

Location: Rucks Pit, Okeechobee County, Florida, United States

Weight: 1 Pound 5.6 Ounces

Dimensions: 5.4 Inches Long, 3.8 Inches Wide, 2.5 Inches Thick

This is a genuine fossil.

The item pictured is the one you will receive. 

Mercanaria Clams are extinct marine bivalve mollusks from the family Mercanariidae, dating back to the Miocene epoch, around 20 million years ago. These fossil clams are easily recognized by their unique shell shape and the presence of three to four cardinal teeth on each valve, making them highly prized by fossil collectors, paleontologists, and educational institutions.

One of the most remarkable features of Mercanaria fossils is the rare preservation of soft body parts, including the mantle and siphon, providing an unprecedented look into the anatomy and lifestyle of this ancient species. Such detailed preservation allows scientists to study behavior, feeding habits, and ecological interactions in Miocene seas.

Mercanaria Clams are commonly found in the Florida Keys, embedded in limestone and dolostone formations, often alongside other Miocene marine organisms such as sharks, rays, and sea turtles. This association offers valuable insight into the rich marine ecosystems of the time and the environmental conditions these clams thrived in.

Ideal for museum exhibits, fossil displays, and private collections, Mercanaria Clams combine scientific importance and aesthetic beauty. Their well-preserved shells, rare soft tissue impressions, and abundance in Florida’s Miocene deposits make them a standout specimen among fossil bivalves.