From the Upper Jurassic,Kimmeridgian/Tithonian
Collected from Muffat county,Colorado,USA.
A good sized section of rib from a Long necked Sauropod Dinosaur.
There are three distinct Camarasaurids known from Colorado, and in all fairness it would be impossible to assign a species level identification,other than stating the supremus to be the type species, so i shall name all three
Camarasaurus Supremus (Cope 1877)
Camarasaurus Grandis (Marsh 1877)
Camarasaurus lewisi (Jensen 1988)
The rib is free from matrix and measures 81mm x 43mm.