Rare Stingray with 3 Fossil Fish
Asterotrygon maloneyi, Priscacara liops
Green River Formation, Wyoming
An exceedingly rare fossil stingray, Asterotrygon maloneyi, with three fossil fish, exemplify the excellent preservation of the finest specimens from the Green River Formation. Fossils from this locality are uncovered from their limestone matrix with the use of pneumatic tools and air abrasion units. As the mineral composition of the fossils is harder than the surrounding limestone matrix, the matrix may be removed without damage to the fossils, revealing the amazing preservation of each specimen as it lay on the bottom of the ancient lake. The most rare stingray from its locality, the species was recently described by Dr. Lance Grande of the Field Museum in Chicago. The present specimen has no restoration.
Stingray measures 7 ½ in. across the disc. Matrix measures 32 ½ in. by 28 in