Skull (cast) of the plesiosaur Thalassomedon haningtoni, from Valley Anatomical Preparations, Canoga Park, CA.
Mounted skeleton of Thalassomedon haningtoni, as seen in this souvenir postcard from the Denver Museum of Nature and Science (formerly Denver Museum of Natural History); also, a collectors postcard showing artist William Stout’s 1990 painting of another kind of plesiosaur Cryptoclidus.
