Pattonomys flavidus is a spiny rat from Margarita Island, Venezuela. The adult male type specimen has an ochraceous-yellow back lined with black and white-tipped spines on the rump. Two animals were hand-caught from tree holes on the western Macanao Peninsula.
The adult male type specimen has a grizzled ochraceous-yellow back lined with black, a slightly browner rump, robust white-tipped spines confined to the rump, a grayish head and neck, and yellow-buff underparts.
A 2018 review reports two animals hand-caught from tree holes on western Margarita, where a forested protected area was present. These are limited capture records; they do not establish regular nesting or habitat preference.
An extinction-risk assessment has not been added yet.