Wandering Oldfield mouse

{{Short description|Species of rodent}}

{{speciesbox

| name = Wandering Oldfield mouse

| status = LC | status_system = IUCN3.1

| status_ref = {{cite iucn |author=Pacheco, V. |date=2016 |title=Thomasomys erro |volume=2016 |page=e.T136345A22367399 |doi=10.2305/IUCN.UK.2016-2.RLTS.T136345A22367399.en |access-date=19 November 2021}}

| genus = Thomasomys

| species = erro

| authority = Anthony, 1926

| synonyms = }}

The wandering Oldfield mouse (Thomasomys erro), also called the wandering thomasomys,{{MSW3 Musser | id = 13000947 | page = 1181}} is a species of rodent in the family Cricetidae. It has been found in both the Cordillera Oriental and Cordillera Occidental of the Andes in central and north central Ecuador, at elevations from 2400 to 3600 m. It has terrestrial habits, and has been found in cloud forest and areas of secondary vegetation. It was formerly considered a subspecies of T. cinereiventer.{{cite journal

| last = Voss

| first = R. S.

| title = A New Species of Thomasomys (Rodentia: Muridae) from Eastern Ecuador, with Remarks on Mammalian Diversity and Biogeography in the Cordillera Oriental

| journal = American Museum Novitates

| issue = 3421

| pages = 1–47

| publisher = American Museum of Natural History

| date = 2003-12-09

| url = http://digitallibrary.amnh.org/dspace/bitstream/2246/2850/1/N3421.pdf

| doi = 10.1206/0003-0082(2003)421<0001:ANSOTR>2.0.CO;2

| s2cid = 62795333

| id =

| accessdate = 2009-08-07

}}