Stunning Fossil Model - Mixosaurus Mixosaurus, meaning "mixed lizard," belongs to the order Ichthyosaurus and is an extinct diploid reptile that lived in the middle Triassic period 240 million years ago. This fossil is a replica cast, made from a special plaster that has the same feel and texture as the real thing. Every detail is perfect Size: 30*25cm Period: Middle Triassic Aniian Place of Origin: Luoping, Yunnan, China Weight: 1.15kg