Onchosaurus

{{Short description|Extinct genus of cartilaginous fishes}}

{{Automatic taxobox

| fossil_range = Late Cretaceous, {{fossil range|84.9|66.043}}

| image = Sclerorhynchidae - Onchosaurus marocanus.JPG

| image_caption = Fossil vertebrae of Onchosaurus marocanus from Khouribga (Morocco)

| taxon = Onchosaurus

| authority = Gervais, 1852

| type_species = {{extinct}}Onchosaurus radicalis

| type_species_authority = Gervais, 1852

| subdivision_ranks = Species

| subdivision =

• {{extinct}}O. marocanus Arambourg, 1935
• {{extinct}}O. pharao (Dames, 1887)
• {{extinct}}O. radicalis Gervais. 1852 (type species)

| synonyms =

• Gigantichthys? Dames, 1887
• Onchosaurus maroccanus Arambourg, 1935 (sic)
• Titanichtys pharao Dames, 1887
• Ischyrhiza iwakiensis Uyeno & Hasegawa, 1986
• Onchosaurus iwakiensis Suárez & Cappetta, 2004
• Onchopristis pharao Martill & Ibrahim, 2012

}}

Onchosaurus is an extinct genus of sclerorhynchoid fish 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, Colombia, Chile,{{ cite journal | last1 = Suárez | first1 = M. E. | last2 = Cappetta | first2 = H. | title = Sclerorhynchid teeth (Neoselachii, Sclerorhynchidae) from the Late Cretaceous of the Quiriquina Formation, central Chile | journal = Revista Geológica de Chile | volume = 31 | year = 2004 | issue = 1 | pages = 89–103 | doi = 10.4067/S0716-02082004000100005 | doi-access = free }} Peru and the United States.