Onchosaurus

Onchosaurus is an extinct genus of sclerorhynchid sawskate from the Late Cretaceous (84.9 to 66.043 million years ago). Its fossils have been found in the Cretaceous sediments of Egypt, Brazil, Congo, Morocco, France, Niger, Japan, Chile, Peru and the United States.

Description
These sclerorhynchid sawskates 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:


 * Onchosaurus marocanus Arambourg, 1935
 * Onchosaurus pharao (Dames, 1887)
 * Onchosaurus radicalis Gervais, 1852