Miahuatlán cotton rat

{{Short description|Species of rodent}}

{{speciesbox | name = Miahuatlán cotton rat

| status = EN | status_system = IUCN3.1

| status_ref = {{cite iucn|author=Álvarez-Castañeda, S.T.|author2=Castro-Arellano, I.|author3=Lacher, T.|author4=Vázquez, E.|author5=Arroyo-Cabrales, J.|year= 2008|url= https://www.iucnredlist.org/details/136405/0|title=Sigmodon planifrons|access-date=1 March 2009}}

| image =

| genus = Sigmodon

| species = planifrons

| authority = Nelson & Goldman, 1933

}}

The Miahuatlán cotton rat (Sigmodon planifrons) was formerly considered a rodent species in the family Cricetidae.{{MSW3 Muroidea | id = 13000923 | page = 1177}} It is found only on the Pacific slope of the Sierra de Miahuatlán in the Mexican state of Oaxaca, where it lives in deciduous tropical forest. The IUCN currently considers it to be conspecific with Sigmodon alleni.{{cite iucn|author=de Grammont, P.C.|author2= Cuarón, A.D.|title= Sigmodon alleni|year= 2018|page= e.T115591937A22355693||access-date=27 December 2019}}