A pair of Keichousaurus hui (K. hui) marine reptile fossils. This piece consists of two Keichousaurus (one on either side). The complete Keichousaurus has been treated to darken the bones and make them 'pop' out from the surrounding matrix, the partial specimen on the other side is left completely natural. Each specimen offers a different view, one offering a ventral and the other a dorsal view. The slab has several minerals veins running through it and a repair (the piece has split along one of those veins and both sides were reattached).
Keichousaurus is a genus of marine reptile in the pachypleurosaur family which went extinct at the close of the Triassic in the Triassic-Jurassic extinction event. The name derives from Kweichow (now Guizhou Province) in China where the first fossil specimen was discovered in 1957. They are among the most common sauropterygian fossils recovered and are often found as nearly complete, articulated skeletons, making them popular among collectors.
Size: 7.75 inch - largest Keichousaurus (slab measures 11 x 8 inches)
Age: 242 million years (Triassic, Spathian Stage)
Locality: Huxia Formation, Guizhou Province, China