Free shipping! The moment of birth was buried and fossilized! Pregnant Keichousaurus in good condition. Usually pregnant individuals are rare. The animal is about 26 cm. These are museum-quality fossils. This fossil was cleaned using a pneumatic pen, so many details are well preserved. Keichousaurus (key-cho-saurus) 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.