Ecological Risk Screening Summary - Potamotrygon humerosa (a stingray, no common name) - Uncertain Risk

Species that are considered uncertain risk need a more in-depth assessment beyond the Risk Summary to better define the species’ risk to U.S. environments.

Potamotrygon brachyura is a freshwater stringray native to the lowland areas of the Amazon River basin in Brazil. Little is known about the species, and there are only a few fish collection records. Based on those records there is expert opinion that the species would not be desired in the ornamental trade. The history of invasiveness is classified as No Known Nonnative Population. There were no records of introductions found. The climate match to the contiguous United States is low, with no areas of medium or high match. The certainty of this assessment is low due to a lack of information. The overall risk assessment category is Uncertain.