Sierra Tontal tuco-tuco

{{Short description|Species of rodent}}

{{Speciesbox

| name = Sierra Tontal tuco-tuco

| image =

| status = DD

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Bidau, C.J. |date=2019 |title=Ctenomys tulduco |volume=2019 |page=e.T136826A22197188 |doi=10.2305/IUCN.UK.2019-1.RLTS.T136826A22197188.en |access-date=19 November 2021}}

| genus = Ctenomys

| species = tulduco

| authority = Thomas, 1921

| synonyms =

}}

The Sierra Tontal tuco-tuco (Ctenomys tulduco) is a species of rodent in the family Ctenomyidae.{{MSW3 Hystricognathi | id = 13400362 | page = 1570}} It is known only from a small locality in the Sierra del Tontal, San Juan Province, west central Argentina.