Additional largely complete skeletons of "T. proriger" and "T. dyspelor" were uncovered from the Niobrara Formation between the 1900s to 1920s by Charles Sternberg and his son George, which were sold to museums in the United States and Germany. A particular find was a "T. proriger" skeleton collected by C. Sternberg from Smoky Hill Chalk deposits in Logan County, Kansas in 1917, which contained digested remains of a plesiosaur within its ribcage. The specimen was sold the following year to the Smithsonian, and the mosasaur has been permanently displayed as USNM 8898. The plesiosaur remains, despite their significance, were stashed as a separate specimen and promptly forgotten until their redescription by Everhart in 2004. This rediscovery formed the basis for the plot of the 2007 National Geographic film "". George Sternberg attempted to sell another complete "T. proriger" skeleton he found to the Smithsonian 1926, but the museum was satisfied with his father's earlier specimen and declined the offer. This skeleton was ultimately transferred to the Sternberg Museum as FHSM VP-3.