I've seen several recent restorations of the short-necked plesiosaur, Dolichorhynchops, that are showing the same error. I suspect the reason is that folks are using the Sternberg Museum specimen assembled and studied by Orville Bonner as is. The skull is dorsoventrally crushed and adjustments should be made or you'll end up with a Tex Avery polycotylid. DV