Chelosphargis

{{Short description|Extinct genus of turtles}}

{{automatic taxobox

| fossil_range = Late Cretaceous, {{fossilrange|83}}

| image = Chelosphargis advena type.jpg

| image_caption =

| taxon = Chelosphargis

| authority = Zangerl, 1953

| type_species = {{extinct}}Protostega advena

| type_species_authority = (Hay, 1908)

| subdivision_ranks = Species

| subdivision =

• {{extinct}}Chelosphargis advena (Hay, 1908)

| synonyms =

• Protostega advena Hay, 1908

}}

Chelosphargis is an extinct genus of sea turtle from Upper Cretaceous of Alabama. Only one species has been described, Chelosphargis advena.Zangerl, R., 1953, The Vertebrate Fauna of the Selma Formation of Alabama. Part III. The Turtles of the family Protostegidae. Part IV. The Turtles of the family Toxochelydiae. Fieldiana: Geology Memoirs v. 3, n. 3 and 4, p. 57-276.