Because "O. simus" was originally named based on poorly preserved fossil material, the genus "Ornithocheirus" has suffered enduring problems of of England, dating to the beginning of the Albian stage of the late Cretaceous period, about 110 million years ago.
Because "O. simus" was originally named based on poorly preserved fossil material, the genus "Ornithocheirus" has suffered enduring problems of zoological nomenclature. Fossil remains of "Ornithocheirus" have been recovered mainly from the Cambridge Greensand of England, dating to the beginning of the Albian stage of the late Cretaceous period, about 110 million years ago.