Upper Jurassic Period, 145 million years BP. A group a three Camarasaurus sp. bones, comprising a neck vertebra section and two rib sections. 530 grams total, 6-10.4cm (2 1/4 - 4"). From the Pradi Collection, Boston, USA; acquired during 1980s; from the Morrison Formation, Big Horn Basin, Wyoming, USA. [3, No Reserve]