Hypostomus borellii is a species of catfish in the family Loricariidae. It is native to the upper and middle Pilcomayo River basin in Argentina, Uruguay, and Bolivia. The species reaches 16.1cm (06.3inches) standard length and is believed to be a facultative air-breather.
The fish is named in honor of French-born Italian zoologist Alfredo Borelli (1858–1943) of the Università di Torino, who led three expeditions to South America and collected many animals, including the holotype of this species.[1]