than the O. mantelli syntypes from England. This all changed with the discoveries of some exceptionally well-preserved skeletons of the shark in the Niobrara Formation in West Kansas. Charles H. Sternberg discovered the first skeleton in 1890, which he described in a 1907 paper: Charles R. Eastman published his analysis of the skeleton in 1894. In the paper, he reconstructed the dentition based on the skeleton's disarticulated tooth set. Using the reconstruction, Eastman identified the many extinct shark species and found that their fossils are actually different tooth types of O. mantelli, which he all moved into the species. This skeleton, which Sternberg had sold to the Ludwig Maximilian University of Munich, was destroyed in 1944 by allied bombing during World War II. In 1891, Sternberg's son George F. Sternberg discovered a second O. mantelli skeleton now housed in the University of Kansas Museum of Natural History as KUVP 247. This skeleton was reported to measure in length and consists of a partial vertebral column with skeletal remains of a Xiphactinus as stomach contents and partial jaws with about 150 teeth visible. This skeleton was considered to be one of the greatest scientific discoveries of that year due to the unexpected preservation of cartilage. George F. Sternberg would later discover more O. mantelli skeletons throughout his career. His most notable finds were FHSM VP-323 and FHSM VP-2187, found in 1950 and 1965 respectively. The former is a partial skeleton consisting of a well-preserved set of jaws, a pair of five gills, and some vertebra while the latter is a near-complete skeleton with an almost complete vertebral column and an exceptionally preserved skull holding much of the cranial elements, jaws, teeth, a set of scales, and fragments of pectoral girdles and fins in their natural positions. Both skeletons are currently housed in the Sternberg Museum of Natural History. In 1968, a collector named Tim Basgall discovered another notable skeleton that, similar to FHSM VP-2187, also consisted of a near-complete vertebral column and a partially preserved skull. This fossil is housed in the University of Kansas Museum of Natural History as KUVP 69102. In 1958, Soviet paleontologist Leonid Glickman found that the dental design of O. mantelli reconstructed by Eastman made it distinct enough to warrant a new genus—Cretoxyrhina. He also identified a second species of Cretoxyrhina based on some of the earlier Cretoxyrhina teeth, which he named Cretoxyrhina denticulata. Originally, Glickman