Chasmocranus

{{Short description|Genus of fishes}}

{{Automatic taxobox

| image = The freshwater fishes of British Guiana, including a study of the ecological grouping of species and the relation of the fauna of the plateau to that of the lowlands (1912) (14593264807).jpg

| image_caption = Chasmocranus longior top

| taxon = Chasmocranus

| authority = C. H. Eigenmann, 1912

| type_species = Chasmocranus longior

| type_species_authority = Eigenmann, 1912

| subdivision_ranks = Species

| subdivision = See text

}}

Chasmocranus is a genus of three-barbeled catfishes native to South America.