Rare Viviparous Reesidei Fossil Snail

Fossil Snail - Viviparous Reesidei from Utah. This is one of the largest ones we have.  Shows great details.
Measurements are about:  15mm x 12mm and 8mm thick. Weighs 9 cts.
 
Snail comes from Grand County, Utah found in the Brushy Basin Member in the Morrison Formation. This snail is about 140 million years old from the Jurassic Time Period and is very rare.