Speciest List
As of July 2006, FishBase lists seventeen distinct species.
- Short-tailed river stingray, P. brachyura (Günther, 1880).
- Vermiculate river stingray, P. castexi (Castello & Yagolkowski, 1969).
- Thorny river stingray, P. constellata (Vaillant, 1880).
- Largespot river stingray, P. falkneri (Castex & Maciel, 1963).
- Bigtooth river stingray, P. henlei (Castelnau, 1855).
- Porcupine river stingray, P. hystrix (Müller & Henle, 1834).
- White-blotched river stingray, P. leopoldi (Castex & Castello, 1970).
- Magdalena river stingray, P. magdalenae (Duméril, 1865).
- P. Marinae, (Deynat, 2006)
- Ocellate river stingray, P. motoro (Müller & Henle, 1841).
- Red-blotched river stingray, P. ocellata (Engelhardt, 1912).
- Smooth back river stingray, P. orbignyi (Günther, 1880).
- Rosette river stingray, P. schroederi (Fernández-Yépez, 1957).
- P. schuhmacheri (Castex, 1964).
- Raspy river stingray, P. scobina (Garman, 1913).
- Parnaiba river stingray, P. signata (Garman, 1913).
- Maracaibo river stingray, P. yepezi (Castex & Castello, 1970).