Bare-tailed armored tree-rat

{{Short description|Species of rodent}}

{{Speciesbox

| name = Bare-tailed armored tree-rat

| image =

| status = DD

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Vivar, E. |author2=Patterson, B. |date=2016 |title=Pattonomys occasius |volume=2016 |page=e.T39314A22212546 |doi=10.2305/IUCN.UK.2016-2.RLTS.T39314A22212546.en |access-date=11 November 2021}}

| genus = Pattonomys

| species = occasius

| authority = (Thomas, 1921)

| synonyms = Echimys occasius Thomas, 1921

Makalata occasius (Thomas, 1921)

}}

The bare-tailed armored tree-rat (Pattonomys occasius) is a species of arboreal rodent in the family Echimyidae. It is found in lowland tropical rainforest east of the Andes in Ecuador and Peru.