Global InformationPotamotrygon rex information
| Potamotrygon rex | |
|---|---|
| |
| Adult Potamotrygon rex (photo by Marcelo R. De Carvalho) | |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Subclass: | Elasmobranchii |
| Superorder: | Batoidea |
| Order: | Myliobatiformes |
| Family: | Potamotrygonidae |
| Genus: | Potamotrygon |
| Species: | P. rex
|
| Binomial name | |
| Potamotrygon rex M. R. de Carvalho, 2016
| |
Potamotrygon rex, the great river stingray, is a species of freshwater stingray belonging to the family Potamotrygonidae, native to South America in the Neotropical region.[1][2] P. rex, along with some other Potamotrygon species form a sub-species group known as "black stingrays" known by their similar features and their locality to rivers draining the Central Brazilian Shield. Specifically, it is native to the Rio Tocantins in the central Brazilian state of Tocantins. It is quite a large organism, weighing up to 20 kg (44 pounds). Its appearance is dark brown to blackish with distinct clusters of yellow-orange spots around similarly colored ocelli on its dorsal side. Distinguishing features include broad pelvic-fin apices, lack of labial grooves, irregular double row of dorsal tail thorns, and having two angular cartilages associated with each hyomandibula.
- ^ "Potamotrygon rex". www.gbif.org. GBIF. Retrieved 2020-11-04.
- ^ Monteiro Dos Santos, Juliane; Cardoso Dos Santos, Janaína; Marques, Elineide Eugênio; Araújo, Gessi Carvalho de; Seibert, Carla Simone; Lopes-Ferreira, Mônica; Lima, Carla (May 2019). "Stingray (Potamotrygon rex) maturity is associated with inflammatory capacity of the venom". Toxicon: Official Journal of the International Society on Toxinology. pp. 74–83. doi:10.1016/j.toxicon.2019.03.013. PMID 30898532. Retrieved 2020-11-04.