Ichthyosaurus fossil ; photo by Ballista on Wikipedia (use permitted with attribution /share alike).
Official State Fossil of Nevada
Nevada designated Ichthyosaur (genus Shonisaurus) as the official state fossil in 1977. All State Fossils
Nevada is the only state to possess a complete Ichthyosaur skeleton, which is approximately 55 feet long (found in Berlin, Nevada). Ichthyosaurs (the name means "fish lizard") is an extinct predatory marine reptile that lived 200 million years ago.