Monjurosuchus was first found in China as part of the Early Cretaceous Jehol Biota. Named in 1940, the type species M. splendens was the first reptile described from the Yixian Formation. The holotype specimen was lost during World War II but was replaced in 2000 by a recently discovered neotype preserving soft tissue.[1] In 2007, remains were described from the Okurodani Formation of the Tetori Group of Japan. The Japanese material represents a different species of Monjurosuchus that has not yet been named.[2]