From CCNews in the USA:
Fossils From Ancient Sea Monster Found in Montana
2006-11-03
A fossil-hunting trip to celebrate a son’s homecoming resulted in the recent discovery of an ancient sea monster in central Montana.
Believed to be approximately 70 million years old, its skull and lower jaw represent the first complete skull of a long-necked plesiosaur found in Montana, according to Montana State University experts.
The skull is said to be one of the best specimens of its kind in North America.
It is an elasmosaur plesiosaur; see here.
See also here.
Dear Kitty. Some blog 
Pingback: Plesiosaur skeleton put together again in England | Dear Kitty. Some blog