Onchosaurus
Onchosaurus is an extinct genus of sclerorhynchid sawfish from the Late Cretaceous (84.9 to 66.043 million years ago). Its fossils have been found in the Cretaceous sediments of Egypt, Morocco, France, Niger, Japan, Chile, Peru and the United States. Description. These sclerorhynchiform sawfishes are only known by isolated vertebra and rostral spines. On the basis of fossil findings they are considered large, bottom-dwelling fishes, mainly inhabiting shallow marine habitats, but they were also powerful swimmers. Species. Species within this genus include: