Bishanopliosaurus

Bishanopliosaurus is a genus of plesiosaur. The type species is B. youngi, based on remains found in the Ziliujing Formation of China.

Description
Bishanopliosaurus was a small plesiosaur, measuring about 4 m long. It can be differentiated by the bifurcated ribs of its sacrum. Unusually, it appears to be a freshwater plesiosaur. A second species, B. zigongensis, is known from the slightly later Xiashaximiao Formation.