Liaobatrachus (meaning "Liaoning frog") is a genus of prehistoric spadefoot toads, the first fossil specimen of which was recovered from the Yixian Formation of Liaoning Province, China. It was the first Mesozoic era frog ever found in China. Later discoveries were named Callobatrachus sanyanensis and Mesophryne beipiaoensis until both were classified as synonymous with Liaobatrachus. It is a discoglossoid anuran. Fossils were found in the Sihetun locality of the western part of Liaoning province, in the lower part of the Yixian Formation, and date to approximately 124.6 Ma. Another specimen was collected near , 25 kilometres (16 mi) south of Beipiao. The specimen has a snout–vent length of 69 millimetres (2.7 in).Liaobatrachus is considered to be the most basal member of Discoglossidae ba