Mactromya are an extinct genus of bivalve which lived during the Jurassic period, around 200 million years ago. They were marine dwelling fauna which lived in warm tropical oceans. This particular species is known as mactromya cardioides, often characterised by the smooth surface of their shells. They were found in Blockley quarry many years ago, located in Moreton, Gloucestershire. We have two grades available for these fossils, these A grade specimens are much higher quality, with near perfect morphological details being present and very little damage to the shells, they are available in two sizes, show growth lines and hinges and come supplied in a card tray with an information label.