Meteorites, a marine reptile with an extremely long neck that lived 80 million years ago! These creatures measured about 34 feet in length with their necks alone measuring 23 feet long! The skull of the Elasmosaurus was relatively flat with long. Meteorites, Fossils, & More Elasmosaur Dinosaur Tooth 1.858 inches MDB w/COA 80 MYO 10o: Fossils - ✓ FREE DELIVERY possible on eligible purchases. This is an awesome display of a tooth from Elasmosaur. & More Elasmosaur Dinosaur Tooth 1.858 inches MDB w/COA 80 MYO 10o: Industrial & Scientific. Buy Fossils. and certificate of authenticity. 。We have a variety of fossils available so be sure to check out our other listings!! 。 。 。. an informational display card, pointed teeth. The tooth in this display measures 1.858 inches in length and comes with a glass-topped display box.