What is "mesophryne"

Mesophryne beipiaoensis is an extinct species of frog, from the Cretaceous Yixian Formation of Liaoning ( China), and the only species in the genus Mesophryne. It is known from a single specimen collected near Heitizigou, south of Beipiao, from which the specific epithet derives. The specimen has a snout–vent length of .