XLarge #44 pounds, 15\" X 12\" X 7\" Multiple fossilized Bivalves / Dacryomya Ovum For Sale

XLarge Size: 44 pounds
15\" X 12\" X 7\"
Multiple fossilizedBivalves/ Dacryomya OvumShell Nest
Gryphaea arcuata are an extinct species of oyster which lived during the early part of the Jurassic period, making these fossil specimens 200 to 174 million years old. Samples of them can be found through out Europe as well as many other sub species belonging to this group. They are a common find around coastal parts of the UK and are often referred to as \'Devils Toe Nails\' due to their toe nail like appearance yet, unsightly coiled and twisted shape. As expected of a bivalve, the shell is made up of two unequal parts, the top and bottom, the bottom being smaller. It has been inferred that thearcuatasub-species is roughly in the middle of the evolutionary line of gryphaea, with a moderate size and elongated shell, where as later species\' shells appeared to be more wider and flat. These high quality samples will enable you to see many morphological features of the fossil in depth, even without use of magnification, such as the line between the two shells, the hinge and growth lines.Completely undisturbed, no restoration at all!