Paratrygon aiereba (Müller & Henle, 1841)
Synonyms: Disceus sp., Elipesurus sp.
Common name: Pigtail ray, Ceja ray, Manzana ray
Range: Amazon and Orinoco River drainages in Bolivia, Peru, Brazil, and Venezuela
Adult size: 120 - 920 mm DL
Description: Large, rounded disc that is slightly concave in the front. Tail short in comparison with the disc length. Small, knob-like appendages on the margin of the spiracle. Pelvic fins completely covered by disc.
A juvenile specimen from the collection at University of Michigan Museum of Zoology. Originally labeled as genus Elipesurus.
Photo courtesy of Patrick Ryan.