Skull (cast) of the plesiosaur Thalassomedon haningtoni from Valley Anatomical Preparations, Canoga Park, CA.
Mounted skeleton of Thalassomedon haningtoni, as seen in this vintage souvenir postcard from the Denver Museum of Nature and Science (formerly Denver Museum of Natural History); also, postcard showing artist Vladimir Krb’s 1985 life restoration of another kind of plesiosaur, Elasmosaurus, from The Prehistoric Post Card Book (Running Press, 1987).